Achievements & Publications

Discrimination of heavy elements originating from Pop III stars in z = 3 intergalactic medium

Image

Kirihara, Takanobu,   Hasegawa, Kenji,   Umemura, Masayuki,   Mori, Masao,   Ishiyama, Tomoaki

We investigate the distribution of metals in the cosmological volume at z \ensuremath∼ 3, in particular, provided by massive Population III (Pop III) stars using a cosmological N-body simulation in which a model of Pop III star formation is implemented. Owing to the simulation, we can choose minihaloes where Pop...

Spiral-arm instability - III. Fragmentation of primordial protostellar discs

Image

Inoue, Shigeki,   Yoshida, Naoki

We study the gravitational instability and fragmentation of primordial protostellar discs by using high-resolution cosmological hydrodynamics simulations. We follow the formation and evolution of spiral arms in protostellar discs, examine the dynamical stability, and identify a physical mechanism of secondary protostar formation. We use linear perturbation theory based on the...

The thermal-radiative wind in low-mass X-ray binary H1743-322: radiation hydrodynamic simulations

Image

Tomaru, Ryota,   Done, Chris,   Ohsuga, Ken,   Nomura, Mariko,   Takahashi, Tadayuki

Blueshifted absorption lines are seen in high inclination black hole binary systems in their disc-dominated states, showing these power an equatorial disc wind. While some contribution from magnetic winds remain a possibility, thermal and thermal- radiative winds are expected to be present. We show results from radiation hydrodynamic simulations that...

First Identification of 10 kpc [C II] 158 \ensuremathμm Halos around Star-forming Galaxies at z = 5─7

Image

Fujimoto, Seiji,   Ouchi, Masami,   Ferrara, Andrea,   Pallottini, Andrea,   Ivison, R.~J.,   Behrens, Christoph

We report the discovery of 10 kpc [C II] 158 \ensuremathμm halos surrounding star-forming galaxies in the early universe. We choose deep Atacama Large Millimeter/submillimeter Array data for 18 galaxies, each with a star formation rate of ≃10─70 M $_☉$ with no signature of an active galactic nucleus whose [C...

Searching for signs of jet-driven negative feedback in the nearby radio galaxy UGC 05771

Image

Zovaro, Henry R.~M.,   Nesvadba, Nicole P.~H.,   Sharp, Robert,   Bicknell, Geoffrey V.,   Groves, Brent,   Mukherjee, Dipanjan

Hydrodynamical simulations predict that the jets of young radio sources can inhibit star formation in their host galaxies by injecting heat and turbulence into the interstellar medium (ISM). To investigate jet-ISM interactions in a galaxy with a young radio source, we have carried out a multiwavelength study of the z...

Abundant Refractory Sulfur in Protoplanetary Disks

Image

Kama, Mihkel,   Shorttle, Oliver,   Jermyn, Adam S.,   Folsom, Colin P.,   Furuya, Kenji,   Bergin, Edwin A.

Sulfur is one of the most abundant elements in the universe, with important roles in astro-, geo-, and biochemistry. Its main reservoirs in planet-forming disks have previously eluded detection: gaseous molecules only account for <1% of total elemental sulfur, with the rest likely in either ices or refractory minerals. We...

ALMA observations of water deuteration: a physical diagnostic of the formation of protostars

Image

Jensen, S.~S.,   Jørgensen, J.~K.,   Kristensen, L.~E.,   Furuya, K.,   Coutens, A.,   van Dishoeck, E.~F.

Context. How water is delivered to planetary systems is a central question in astrochemistry. The deuterium fractionation of water can serve as a tracer for the chemical and physical evolution of water during star formation and can constrain the origin of water in Solar System bodies. Aims: The aim is...

Super-Eddington growth of black holes in the early universe: effects of disc radiation spectra

Image

Takeo, Eishun,   Inayoshi, Kohei,   Ohsuga, Ken,   Takahashi, Hiroyuki R.,   Mineshige, Shin

We investigate the properties of accretion flows on to a black hole (BH) with a mass of M$_BH$ embedded in an initially uniform gas cloud with a density of n$_\ensuremathınfty$ in order to study rapid growth of BHs in the early Universe. In previous work, the conditions required for super-Eddington...

Feedback from low-luminosity radio galaxies: B2 0258+35

Image

Murthy, Suma,   Morganti, Raffaella,   Oosterloo, Tom,   Schulz, Robert,   Mukherjee, Dipanjan,   Wagner, Alexander Y.

Low-luminosity radio-loud active galactic nuclei (AGN) are of importance in studies concerning feedback from radio AGN since a dominant fraction of AGN belong to this class. We report high-resolution Very Large Array (VLA) and European VLBI Network (EVN) observations of H I 21 cm absorption from a young, compact steep-spectrum...

Clumpy galaxies in cosmological simulations: the effect of ISM model

Image

Inoue, Shigeki,   Yoshida, Naoki

We study influence by models of interstellar medium (ISM) on properties of galaxies in cosmological simulations. We examine three models widely used in previous studies. The ISM models impose different equations of state on dense gas. Using zoom-in simulations, we demonstrate that switching the ISM models can control formation of...

H$_2$ Ortho-Para Spin Conversion on Inhomogeneous Grain Surfaces

Image

Furuya, Kenji,   Aikawa, Yuri,   Hama, Tetsuya,   Watanabe, Naoki

We investigate the evolution of the ortho-to-para ratio of overall (gas + ice) \\\H\\\$_2$ via the nuclear spin conversion on grain surfaces coated with water ice under physical conditions that are relevant to star- and planet-forming regions. We utilize the rate equation model that considers adsorption of gaseous \\\H\\\$_2$ on...

Radiative properties of the first galaxies: rapid transition between UV and infrared bright phases

Image

Arata, Shohei,   Yajima, Hidenobu,   Nagamine, Kentaro,   Li, Yuexing,   Khochfar, Sadegh

Recent observations have successfully detected UV-bright and infrared- bright galaxies in the epoch of reionization. However, the origin of their radiative properties has not been understood yet. Combining cosmological hydrodynamic simulations and radiative transfer calculations, we present predictions of multiwavelength radiative properties of the first galaxies at z ̃ 6-15....

Magnetohydrodynamic simulation code CANS+: Assessments and applications

Image

Matsumoto, Yosuke,   Asahina, Yuta,   Kudoh, Yuki,   Kawashima, Tomohisa,   Matsumoto, Jin,   Takahashi, Hiroyuki R.

We present a new magnetohydrodynamic (MHD) simulation package with the aim of providing accurate numerical solutions to astrophysical phenomena where discontinuities, shock waves, and turbulence are inherently important. The code implements the Harten-Lax-van Leer-discontinuitues (HLLD) approximate Riemann solver, the fifth-order-monotonicity-preserving interpolation (MP5) scheme, and the hyperbolic divergence cleaning method for...

On the dynamics and survival of fractal clouds in galactic winds

Image

Banda-Barragán, W.~E.,   Zertuche, F.~J.,   Federrath, C.,   Garcı́a Del Valle, J.,   Brüggen, M.,   Wagner, A.~Y.

Recent observations suggest that dense gas clouds can survive even in hot galactic winds. Here we show that the inclusion of turbulent densities with different statistical properties has significant effects on the evolution of wind-swept clouds. We investigate how the initial standard deviation of the lognormal density field influences the...

Jets blowing bubbles in the young radio galaxy 4C 31.04

Image

Zovaro, Henry R.~M.,   Sharp, Robert,   Nesvadba, Nicole P.~H.,   Bicknell, Geoffrey V.,   Mukherjee, Dipanjan,   Wagner, Alexand er Y.

We report the discovery of shocked molecular and ionized gas resulting from jet-driven feedback in the low-redshift (z = 0.0602) compact radio galaxy 4C 31.04 using near-IR imaging spectroscopy. 4C 31.04 is a ̃100 pc double-lobed Compact Steep Spectrum source believed to be a very young active galactic nucleus (AGN)....

Osaka feedback model: isolated disc galaxy simulations

Image

Shimizu, Ikkoh,   Todoroki, Keita,   Yajima, Hidenobu,   Nagamine, Kentaro

We study various implementations of a supernova (SN) feedback model and present the results of our `Osaka feedback model' using isolated galaxy simulations performed by the smoothed particle hydrodynamics code GADGET-3. Our model is a modified version of Stinson et al.'s work, and we newly add the momentum kick for...

Systematic two-dimensional radiation-hydrodynamic simulations of super-Eddington accretion flow and outflow: Comparison with the slim disk model

Image

Kitaki, Takaaki,   Mineshige, Shin,   Ohsuga, Ken,   Kawashima, Tomohisa

To what extent can the one-dimensional slim disk model reproduce the multi-dimensional results of global radiation-hydrodynamic simulations of super-Eddington accretion? With this question in mind, we perform a systematic simulation study of accretion flow onto a non-spinning black hole for a variety of black hole masses of (10-10$^7$) M$_☉$ and...

Probing the high-redshift universe with SPICA: Toward the epoch of reionisation and beyond

Image

Egami, E.,   Gallerani, S.,   Schneider, R.,   Pallottini, A.,   Vallini, L.,   Sobacchi, E.

With the recent discovery of a dozen dusty star-forming galaxies and around 30 quasars at z > 5 that are hyper-luminous in the infrared (\ensuremathμ L $_IR$ > 10$^13$ L$_☉$, where \ensuremathμ is a lensing magnification factor), the possibility has opened up for SPICA, the proposed ESA M5 mid-/far-infrared mission,...

A Cool Core Disturbed: Observational Evidence for the Coexistence of Subsonic Sloshing Gas and Stripped Shock-heated Gas around the Core of RX J1347.5-1145

Image

Ueda, Shutaro,   Kitayama, Tetsu,   Oguri, Masamune,   Komatsu, Eiichiro,   Akahori, Takuya,   Iono, Daisuke

RX J1347.5-1145 (z = 0.451) is one of the most luminous X-ray galaxy clusters; it hosts a prominent cool core and exhibits a signature of a major merger. We present the first direct observational evidence for the subsonic nature of the sloshing motion of the cool core. We find that...

Linking interstellar and cometary O$_2$: a deep search for $^16$O$^18$O in the solar-type protostar IRAS 16293-2422

Image

Taquet, V.,   van Dishoeck, E.~F.,   Swayne, M.,   Harsono, D.,   Jørgensen, J.~K.,   Maud, L.

Recent measurements carried out at comet 67P/Churyumov-Gerasimenko (67P) with the Rosetta probe revealed that molecular oxygen, O$_2$, is the fourth most abundant molecule in comets. Models show that O$_2$ is likely of primordial nature, coming from the interstellar cloud from which our solar system was formed. However, gaseous O$_2$ is...

Relativistic jet feedback - III. Feedback on gas discs

Image

Mukherjee, Dipanjan,   Bicknell, Geoffrey V.,   Wagner, Alexand er Y.,   Sutherland, Ralph S.,   Silk, Joseph

We study the interactions of a relativistic jet with a dense turbulent gaseous disc of radius ̃2 kpc. We have performed a suite of simulations with different mean density, jet power, and orientation. Our results show that: (A) The relativistic jet couples strongly with the gas in the inner kpc,...

Extreme gaseous outflows in radio-loud narrow-line Seyfert 1 galaxies

Image

Komossa, S.,   Xu, D.~W.,   Wagner, A.~Y.

We present four radio-loud narrow-line Seyfert 1 (NLS1) galaxies with extreme emission-line shifts, indicating radial outflow velocities of the ionized gas of up to 2450 km s$^-1$, above the escape velocity of the host galaxies. The forbidden lines show strong broadening, up to 2270 km s$^-1$. An ionization stratification (higher...

Depletion of $^15$N in the center of L1544: Early transition from atomic to molecular nitrogen?

Image

Furuya, K.,   Watanabe, Y.,   Sakai, T.,   Aikawa, Y.,   Yamamoto, S.

We performed sensitive observations of the N$^15$ND$^+$(1-0) and $^15$NND$^+$(1-0) lines toward the prestellar core L1544 using the IRAM 30 m telescope. The lines are not detected down to 3\ensuremathσ levels in 0.2 km s$^-$1 channels of 6 mK. The non-detection provides the lower limit of the $^14$N/$^15$N ratio for N$_2$D$^+$...

SILVERRUSH. VI. A simulation of Ly\ensuremathα emitters in the reionization epoch and a comparison with Subaru Hyper Suprime-Cam survey early data

Image

Inoue, Akio K.,   Hasegawa, Kenji,   Ishiyama, Tomoaki,   Yajima, Hidenobu,   Shimizu, Ikkoh,   Umemura, Masayuki

The survey of Lyman \ensuremathα emitters (LAEs) with the Subaru Hyper Suprime-Cam, called SILVERRUSH (Ouchi et al. 2018, PASJ, 70, S13), is producing massive data of LAEs at z \ensuremath\gtrsim 6. Here we present LAE simulations to compare the SILVERRUSH data. In 162$^3$ comoving Mpc$^3$ boxes, where numerical radiative transfer...

Tracing the atomic nitrogen abundance in star-forming regions with ammonia deuteration

Image

Furuya, Kenji,   Persson, Magnus V.

Partitioning of elemental nitrogen in star-forming regions is not well constrained. Most nitrogen is expected to be partitioned among atomic nitrogen (N I), molecular nitrogen (N_2), and icy N-bearing molecules, such as NH_3 and N_2. N I is not directly observable in the cold gas. In this paper, we propose...

AGN feedback compared: jets versus radiation

Image

Cielo, Salvatore,   Bieri, Rebekka,   Volonteri, Marta,   Wagner, Alexander Y.,   Dubois, Yohan

Feedback by active galactic nuclei (AGNs) is often divided into quasar and radio mode, powered by radiation or radio jets, respectively. Both are fundamental in galaxy evolution, especially in late-type galaxies, as shown by cosmological simulations and observations of jet-ISM (interstellar medium) interactions in these systems. We compare AGN feedback...

Magnetohydrodynamic Simulations of a Plunging Black Hole into a Molecular Cloud

Image

Nomura, Mariko,   Oka, Tomoharu,   Yamada, Masaya,   Takekawa, Shunya,   Ohsuga, Ken,   Takahashi, Hiroyuki R.

Using two-dimensional magnetohydrodynamic simulations, we investigated the gas dynamics around a black hole (BH) plunging into a molecular cloud. In these calculations, we assumed a parallel- magnetic-field layer in the cloud. The size of the accelerated region is far larger than the Bondi-Hoyle-Lyttleton radius, being approximately inversely proportional to the...

The jet-ISM interactions in IC 5063

Image

Mukherjee, Dipanjan,   Wagner, Alexander Y.,   Bicknell, Geoffrey V.,   Morganti, Raffaella,   Oosterloo, Tom,   Nesvadba, Nicole

The interstellar medium of the radio galaxy IC 5063 is highly perturbed by an AGN jet expanding in the gaseous disc of the galaxy. We model this interaction with relativistic hydrodynamic simulations and multiphase initial conditions for the interstellar medium and compare the results with recent observations. As the jets...

SEURAT: SPH scheme extended with ultraviolet line radiative transfer

Image

Abe, Makito,   Suzuki, Hiroyuki,   Hasegawa, Kenji,   Semelin, Benoit,   Yajima, Hidenobu,   Umemura, Masayuki

We present a novel Lyman alpha (Ly \ensuremathα) radiative transfer code, SEURAT (SPH scheme Extended with Ultraviolet line RAdiative Transfer), where line scatterings are solved adaptively with the resolution of the smoothed particle hydrodynamics (SPH). The radiative transfer method implemented in SEURAT is based on a Monte Carlo algorithm in...

ALMA Observations of the IRDC Clump G34.43+00.24 MM3: Complex Organic and Deuterated Molecules

Image

Sakai, Takeshi,   Yanagida, Takahiro,   Furuya, Kenji,   Aikawa, Yuri,   Sanhueza, Patricio,   Sakai, Nami

We have observed complex organic molecules (COMs) and deuterated species toward a hot core/corino (HC) associated with the infrared dark cloud clump G34.43+00.24 MM3 with the Atacama Large Millimeter/submillimeter Array. We have detected six normal-COMs (CH$_3$OH, CH$_3$CHO, CH$_3$CH$_2$CN, CH$_3$OCH$_3$, HCOOCH$_3$, and NH$_2$CHO), one deuterated-COM (CH$_2$DCN), and two deuterated fundamental molecules...

MAGI: many-component galaxy initializer

Image

Miki, Yohei,   Umemura, Masayuki

Providing initial conditions is an essential procedure for numerical simulations of galaxies. The initial conditions for idealized individual galaxies in N-body simulations should resemble observed galaxies and be dynamically stable for time-scales much longer than their characteristic dynamical times. However, generating a galaxy model ab initio as a system in...

Depletion of Heavy Nitrogen in the Cold Gas of Star-forming Regions

Image

Furuya, Kenji,   Aikawa, Yuri

We investigate nitrogen-isotope fractionation in forming and evolving molecular clouds using gas-ice astrochemical simulations. We find that the bulk gas can become depleted in heavy nitrogen ($^15$N) due to the formation of $^15$N-enriched ices. Around the chemical transition from atomic nitrogen to N$_2$, N$^15$N is selectively photodissociated, which results in...

Image

Discrimination of heavy elements originating from Pop III stars in z = 3 intergalactic medium

Kirihara, Takanobu,   Hasegawa, Kenji,   Umemura, Masayuki,   Mori, Masao,   Ishiyama, Tomoaki

We investigate the distribution of metals in the cosmological volume at z \ensuremath∼ 3, in particular, provided by massive Population III (Pop III) stars using a cosmological N-body simulation in which a model of Pop III star formation is implemented. Owing to the simulation, we can choose minihaloes where Pop...

January 2020   Monthly Notices of the Royal Astronomical Society
Image

Spiral-arm instability - III. Fragmentation of primordial protostellar discs

Inoue, Shigeki,   Yoshida, Naoki

We study the gravitational instability and fragmentation of primordial protostellar discs by using high-resolution cosmological hydrodynamics simulations. We follow the formation and evolution of spiral arms in protostellar discs, examine the dynamical stability, and identify a physical mechanism of secondary protostar formation. We use linear perturbation theory based on the...

January 2020   Monthly Notices of the Royal Astronomical Society
Image

The thermal-radiative wind in low-mass X-ray binary H1743-322: radiation hydrodynamic simulations

Tomaru, Ryota,   Done, Chris,   Ohsuga, Ken,   Nomura, Mariko,   Takahashi, Tadayuki

Blueshifted absorption lines are seen in high inclination black hole binary systems in their disc-dominated states, showing these power an equatorial disc wind. While some contribution from magnetic winds remain a possibility, thermal and thermal- radiative winds are expected to be present. We show results from radiation hydrodynamic simulations that...

December 2019   Monthly Notices of the Royal Astronomical Society
Image

First Identification of 10 kpc [C II] 158 \ensuremathμm Halos around Star-forming Galaxies at z = 5─7

Fujimoto, Seiji,   Ouchi, Masami,   Ferrara, Andrea,   Pallottini, Andrea,   Ivison, R.~J.,   Behrens, Christoph

We report the discovery of 10 kpc [C II] 158 \ensuremathμm halos surrounding star-forming galaxies in the early universe. We choose deep Atacama Large Millimeter/submillimeter Array data for 18 galaxies, each with a star formation rate of ≃10─70 M $_☉$ with no signature of an active galactic nucleus whose [C...

December 2019   The Astrophysical Journal
Image

Searching for signs of jet-driven negative feedback in the nearby radio galaxy UGC 05771

Zovaro, Henry R.~M.,   Nesvadba, Nicole P.~H.,   Sharp, Robert,   Bicknell, Geoffrey V.,   Groves, Brent,   Mukherjee, Dipanjan

Hydrodynamical simulations predict that the jets of young radio sources can inhibit star formation in their host galaxies by injecting heat and turbulence into the interstellar medium (ISM). To investigate jet-ISM interactions in a galaxy with a young radio source, we have carried out a multiwavelength study of the z...

November 2019   Monthly Notices of the Royal Astronomical Society
Image

Abundant Refractory Sulfur in Protoplanetary Disks

Kama, Mihkel,   Shorttle, Oliver,   Jermyn, Adam S.,   Folsom, Colin P.,   Furuya, Kenji,   Bergin, Edwin A.

Sulfur is one of the most abundant elements in the universe, with important roles in astro-, geo-, and biochemistry. Its main reservoirs in planet-forming disks have previously eluded detection: gaseous molecules only account for <1% of total elemental sulfur, with the rest likely in either ices or refractory minerals. We...

November 2019   The Astrophysical Journal
Image

ALMA observations of water deuteration: a physical diagnostic of the formation of protostars

Jensen, S.~S.,   Jørgensen, J.~K.,   Kristensen, L.~E.,   Furuya, K.,   Coutens, A.,   van Dishoeck, E.~F.

Context. How water is delivered to planetary systems is a central question in astrochemistry. The deuterium fractionation of water can serve as a tracer for the chemical and physical evolution of water during star formation and can constrain the origin of water in Solar System bodies. Aims: The aim is...

November 2019  
Image

Super-Eddington growth of black holes in the early universe: effects of disc radiation spectra

Takeo, Eishun,   Inayoshi, Kohei,   Ohsuga, Ken,   Takahashi, Hiroyuki R.,   Mineshige, Shin

We investigate the properties of accretion flows on to a black hole (BH) with a mass of M$_BH$ embedded in an initially uniform gas cloud with a density of n$_\ensuremathınfty$ in order to study rapid growth of BHs in the early Universe. In previous work, the conditions required for super-Eddington...

September 2019   Monthly Notices of the Royal Astronomical Society
Image

Feedback from low-luminosity radio galaxies: B2 0258+35

Murthy, Suma,   Morganti, Raffaella,   Oosterloo, Tom,   Schulz, Robert,   Mukherjee, Dipanjan,   Wagner, Alexander Y.

Low-luminosity radio-loud active galactic nuclei (AGN) are of importance in studies concerning feedback from radio AGN since a dominant fraction of AGN belong to this class. We report high-resolution Very Large Array (VLA) and European VLBI Network (EVN) observations of H I 21 cm absorption from a young, compact steep-spectrum...

September 2019  
Image

Clumpy galaxies in cosmological simulations: the effect of ISM model

Inoue, Shigeki,   Yoshida, Naoki

We study influence by models of interstellar medium (ISM) on properties of galaxies in cosmological simulations. We examine three models widely used in previous studies. The ISM models impose different equations of state on dense gas. Using zoom-in simulations, we demonstrate that switching the ISM models can control formation of...

September 2019   Monthly Notices of the Royal Astronomical Society
Image

H$_2$ Ortho-Para Spin Conversion on Inhomogeneous Grain Surfaces

Furuya, Kenji,   Aikawa, Yuri,   Hama, Tetsuya,   Watanabe, Naoki

We investigate the evolution of the ortho-to-para ratio of overall (gas + ice) \\\H\\\$_2$ via the nuclear spin conversion on grain surfaces coated with water ice under physical conditions that are relevant to star- and planet-forming regions. We utilize the rate equation model that considers adsorption of gaseous \\\H\\\$_2$ on...

September 2019   The Astrophysical Journal
Image

Radiative properties of the first galaxies: rapid transition between UV and infrared bright phases

Arata, Shohei,   Yajima, Hidenobu,   Nagamine, Kentaro,   Li, Yuexing,   Khochfar, Sadegh

Recent observations have successfully detected UV-bright and infrared- bright galaxies in the epoch of reionization. However, the origin of their radiative properties has not been understood yet. Combining cosmological hydrodynamic simulations and radiative transfer calculations, we present predictions of multiwavelength radiative properties of the first galaxies at z ̃ 6-15....

September 2019   Monthly Notices of the Royal Astronomical Society
Image

Magnetohydrodynamic simulation code CANS+: Assessments and applications

Matsumoto, Yosuke,   Asahina, Yuta,   Kudoh, Yuki,   Kawashima, Tomohisa,   Matsumoto, Jin,   Takahashi, Hiroyuki R.

We present a new magnetohydrodynamic (MHD) simulation package with the aim of providing accurate numerical solutions to astrophysical phenomena where discontinuities, shock waves, and turbulence are inherently important. The code implements the Harten-Lax-van Leer-discontinuitues (HLLD) approximate Riemann solver, the fifth-order-monotonicity-preserving interpolation (MP5) scheme, and the hyperbolic divergence cleaning method for...

August 2019   Publications of the Astronomical Society of Japan
Image

On the dynamics and survival of fractal clouds in galactic winds

Banda-Barragán, W.~E.,   Zertuche, F.~J.,   Federrath, C.,   Garcı́a Del Valle, J.,   Brüggen, M.,   Wagner, A.~Y.

Recent observations suggest that dense gas clouds can survive even in hot galactic winds. Here we show that the inclusion of turbulent densities with different statistical properties has significant effects on the evolution of wind-swept clouds. We investigate how the initial standard deviation of the lognormal density field influences the...

July 2019   Monthly Notices of the Royal Astronomical Society
Image

Jets blowing bubbles in the young radio galaxy 4C 31.04

Zovaro, Henry R.~M.,   Sharp, Robert,   Nesvadba, Nicole P.~H.,   Bicknell, Geoffrey V.,   Mukherjee, Dipanjan,   Wagner, Alexand er Y.

We report the discovery of shocked molecular and ionized gas resulting from jet-driven feedback in the low-redshift (z = 0.0602) compact radio galaxy 4C 31.04 using near-IR imaging spectroscopy. 4C 31.04 is a ̃100 pc double-lobed Compact Steep Spectrum source believed to be a very young active galactic nucleus (AGN)....

April 2019   Monthly Notices of the Royal Astronomical Society
Image

Osaka feedback model: isolated disc galaxy simulations

Shimizu, Ikkoh,   Todoroki, Keita,   Yajima, Hidenobu,   Nagamine, Kentaro

We study various implementations of a supernova (SN) feedback model and present the results of our `Osaka feedback model' using isolated galaxy simulations performed by the smoothed particle hydrodynamics code GADGET-3. Our model is a modified version of Stinson et al.'s work, and we newly add the momentum kick for...

April 2019   Monthly Notices of the Royal Astronomical Society
Image

Systematic two-dimensional radiation-hydrodynamic simulations of super-Eddington accretion flow and outflow: Comparison with the slim disk model

Kitaki, Takaaki,   Mineshige, Shin,   Ohsuga, Ken,   Kawashima, Tomohisa

To what extent can the one-dimensional slim disk model reproduce the multi-dimensional results of global radiation-hydrodynamic simulations of super-Eddington accretion? With this question in mind, we perform a systematic simulation study of accretion flow onto a non-spinning black hole for a variety of black hole masses of (10-10$^7$) M$_☉$ and...

December 2018   Publications of the Astronomical Society of Japan
Image

Probing the high-redshift universe with SPICA: Toward the epoch of reionisation and beyond

Egami, E.,   Gallerani, S.,   Schneider, R.,   Pallottini, A.,   Vallini, L.,   Sobacchi, E.

With the recent discovery of a dozen dusty star-forming galaxies and around 30 quasars at z > 5 that are hyper-luminous in the infrared (\ensuremathμ L $_IR$ > 10$^13$ L$_☉$, where \ensuremathμ is a lensing magnification factor), the possibility has opened up for SPICA, the proposed ESA M5 mid-/far-infrared mission,...

December 2018   Publications of the Astronomical Society of Australia
Image

A Cool Core Disturbed: Observational Evidence for the Coexistence of Subsonic Sloshing Gas and Stripped Shock-heated Gas around the Core of RX J1347.5-1145

Ueda, Shutaro,   Kitayama, Tetsu,   Oguri, Masamune,   Komatsu, Eiichiro,   Akahori, Takuya,   Iono, Daisuke

RX J1347.5-1145 (z = 0.451) is one of the most luminous X-ray galaxy clusters; it hosts a prominent cool core and exhibits a signature of a major merger. We present the first direct observational evidence for the subsonic nature of the sloshing motion of the cool core. We find that...

October 2018   The Astrophysical Journal
Image

Linking interstellar and cometary O$_2$: a deep search for $^16$O$^18$O in the solar-type protostar IRAS 16293-2422

Taquet, V.,   van Dishoeck, E.~F.,   Swayne, M.,   Harsono, D.,   Jørgensen, J.~K.,   Maud, L.

Recent measurements carried out at comet 67P/Churyumov-Gerasimenko (67P) with the Rosetta probe revealed that molecular oxygen, O$_2$, is the fourth most abundant molecule in comets. Models show that O$_2$ is likely of primordial nature, coming from the interstellar cloud from which our solar system was formed. However, gaseous O$_2$ is...

October 2018  
Image

Relativistic jet feedback - III. Feedback on gas discs

Mukherjee, Dipanjan,   Bicknell, Geoffrey V.,   Wagner, Alexand er Y.,   Sutherland, Ralph S.,   Silk, Joseph

We study the interactions of a relativistic jet with a dense turbulent gaseous disc of radius ̃2 kpc. We have performed a suite of simulations with different mean density, jet power, and orientation. Our results show that: (A) The relativistic jet couples strongly with the gas in the inner kpc,...

October 2018   Monthly Notices of the Royal Astronomical Society
Image

Extreme gaseous outflows in radio-loud narrow-line Seyfert 1 galaxies

Komossa, S.,   Xu, D.~W.,   Wagner, A.~Y.

We present four radio-loud narrow-line Seyfert 1 (NLS1) galaxies with extreme emission-line shifts, indicating radial outflow velocities of the ionized gas of up to 2450 km s$^-1$, above the escape velocity of the host galaxies. The forbidden lines show strong broadening, up to 2270 km s$^-1$. An ionization stratification (higher...

July 2018   Monthly Notices of the Royal Astronomical Society
Image

Depletion of $^15$N in the center of L1544: Early transition from atomic to molecular nitrogen?

Furuya, K.,   Watanabe, Y.,   Sakai, T.,   Aikawa, Y.,   Yamamoto, S.

We performed sensitive observations of the N$^15$ND$^+$(1-0) and $^15$NND$^+$(1-0) lines toward the prestellar core L1544 using the IRAM 30 m telescope. The lines are not detected down to 3\ensuremathσ levels in 0.2 km s$^-$1 channels of 6 mK. The non-detection provides the lower limit of the $^14$N/$^15$N ratio for N$_2$D$^+$...

July 2018  
Image

SILVERRUSH. VI. A simulation of Ly\ensuremathα emitters in the reionization epoch and a comparison with Subaru Hyper Suprime-Cam survey early data

Inoue, Akio K.,   Hasegawa, Kenji,   Ishiyama, Tomoaki,   Yajima, Hidenobu,   Shimizu, Ikkoh,   Umemura, Masayuki

The survey of Lyman \ensuremathα emitters (LAEs) with the Subaru Hyper Suprime-Cam, called SILVERRUSH (Ouchi et al. 2018, PASJ, 70, S13), is producing massive data of LAEs at z \ensuremath\gtrsim 6. Here we present LAE simulations to compare the SILVERRUSH data. In 162$^3$ comoving Mpc$^3$ boxes, where numerical radiative transfer...

June 2018   Publications of the Astronomical Society of Japan
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Tracing the atomic nitrogen abundance in star-forming regions with ammonia deuteration

Furuya, Kenji,   Persson, Magnus V.

Partitioning of elemental nitrogen in star-forming regions is not well constrained. Most nitrogen is expected to be partitioned among atomic nitrogen (N I), molecular nitrogen (N_2), and icy N-bearing molecules, such as NH_3 and N_2. N I is not directly observable in the cold gas. In this paper, we propose...

June 2018   Monthly Notices of the Royal Astronomical Society
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AGN feedback compared: jets versus radiation

Cielo, Salvatore,   Bieri, Rebekka,   Volonteri, Marta,   Wagner, Alexander Y.,   Dubois, Yohan

Feedback by active galactic nuclei (AGNs) is often divided into quasar and radio mode, powered by radiation or radio jets, respectively. Both are fundamental in galaxy evolution, especially in late-type galaxies, as shown by cosmological simulations and observations of jet-ISM (interstellar medium) interactions in these systems. We compare AGN feedback...

June 2018   Monthly Notices of the Royal Astronomical Society
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Magnetohydrodynamic Simulations of a Plunging Black Hole into a Molecular Cloud

Nomura, Mariko,   Oka, Tomoharu,   Yamada, Masaya,   Takekawa, Shunya,   Ohsuga, Ken,   Takahashi, Hiroyuki R.

Using two-dimensional magnetohydrodynamic simulations, we investigated the gas dynamics around a black hole (BH) plunging into a molecular cloud. In these calculations, we assumed a parallel- magnetic-field layer in the cloud. The size of the accelerated region is far larger than the Bondi-Hoyle-Lyttleton radius, being approximately inversely proportional to the...

May 2018   The Astrophysical Journal
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The jet-ISM interactions in IC 5063

Mukherjee, Dipanjan,   Wagner, Alexander Y.,   Bicknell, Geoffrey V.,   Morganti, Raffaella,   Oosterloo, Tom,   Nesvadba, Nicole

The interstellar medium of the radio galaxy IC 5063 is highly perturbed by an AGN jet expanding in the gaseous disc of the galaxy. We model this interaction with relativistic hydrodynamic simulations and multiphase initial conditions for the interstellar medium and compare the results with recent observations. As the jets...

May 2018   Monthly Notices of the Royal Astronomical Society
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SEURAT: SPH scheme extended with ultraviolet line radiative transfer

Abe, Makito,   Suzuki, Hiroyuki,   Hasegawa, Kenji,   Semelin, Benoit,   Yajima, Hidenobu,   Umemura, Masayuki

We present a novel Lyman alpha (Ly \ensuremathα) radiative transfer code, SEURAT (SPH scheme Extended with Ultraviolet line RAdiative Transfer), where line scatterings are solved adaptively with the resolution of the smoothed particle hydrodynamics (SPH). The radiative transfer method implemented in SEURAT is based on a Monte Carlo algorithm in...

May 2018   Monthly Notices of the Royal Astronomical Society
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ALMA Observations of the IRDC Clump G34.43+00.24 MM3: Complex Organic and Deuterated Molecules

Sakai, Takeshi,   Yanagida, Takahiro,   Furuya, Kenji,   Aikawa, Yuri,   Sanhueza, Patricio,   Sakai, Nami

We have observed complex organic molecules (COMs) and deuterated species toward a hot core/corino (HC) associated with the infrared dark cloud clump G34.43+00.24 MM3 with the Atacama Large Millimeter/submillimeter Array. We have detected six normal-COMs (CH$_3$OH, CH$_3$CHO, CH$_3$CH$_2$CN, CH$_3$OCH$_3$, HCOOCH$_3$, and NH$_2$CHO), one deuterated-COM (CH$_2$DCN), and two deuterated fundamental molecules...

April 2018   The Astrophysical Journal
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MAGI: many-component galaxy initializer

Miki, Yohei,   Umemura, Masayuki

Providing initial conditions is an essential procedure for numerical simulations of galaxies. The initial conditions for idealized individual galaxies in N-body simulations should resemble observed galaxies and be dynamically stable for time-scales much longer than their characteristic dynamical times. However, generating a galaxy model ab initio as a system in...

April 2018   Monthly Notices of the Royal Astronomical Society
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Depletion of Heavy Nitrogen in the Cold Gas of Star-forming Regions

Furuya, Kenji,   Aikawa, Yuri

We investigate nitrogen-isotope fractionation in forming and evolving molecular clouds using gas-ice astrochemical simulations. We find that the bulk gas can become depleted in heavy nitrogen ($^15$N) due to the formation of $^15$N-enriched ices. Around the chemical transition from atomic nitrogen to N$_2$, N$^15$N is selectively photodissociated, which results in...

April 2018   The Astrophysical Journal

Discrimination of heavy elements originating from Pop III stars in z = 3 intergalactic medium

Kirihara, Takanobu,   Hasegawa, Kenji,   Umemura, Masayuki,   Mori, Masao,   Ishiyama, Tomoaki
January 2020   Monthly Notices of the Royal Astronomical Society

Spiral-arm instability - III. Fragmentation of primordial protostellar discs

Inoue, Shigeki,   Yoshida, Naoki
January 2020   Monthly Notices of the Royal Astronomical Society

The thermal-radiative wind in low-mass X-ray binary H1743-322: radiation hydrodynamic simulations

Tomaru, Ryota,   Done, Chris,   Ohsuga, Ken,   Nomura, Mariko,   Takahashi, Tadayuki
December 2019   Monthly Notices of the Royal Astronomical Society

First Identification of 10 kpc [C II] 158 \ensuremathμm Halos around Star-forming Galaxies at z = 5─7

Fujimoto, Seiji,   Ouchi, Masami,   Ferrara, Andrea,   Pallottini, Andrea,   Ivison, R.~J.,   Behrens, Christoph
December 2019   The Astrophysical Journal

Searching for signs of jet-driven negative feedback in the nearby radio galaxy UGC 05771

Zovaro, Henry R.~M.,   Nesvadba, Nicole P.~H.,   Sharp, Robert,   Bicknell, Geoffrey V.,   Groves, Brent,   Mukherjee, Dipanjan
November 2019   Monthly Notices of the Royal Astronomical Society

Abundant Refractory Sulfur in Protoplanetary Disks

Kama, Mihkel,   Shorttle, Oliver,   Jermyn, Adam S.,   Folsom, Colin P.,   Furuya, Kenji,   Bergin, Edwin A.
November 2019   The Astrophysical Journal

ALMA observations of water deuteration: a physical diagnostic of the formation of protostars

Jensen, S.~S.,   Jørgensen, J.~K.,   Kristensen, L.~E.,   Furuya, K.,   Coutens, A.,   van Dishoeck, E.~F.
November 2019  

Super-Eddington growth of black holes in the early universe: effects of disc radiation spectra

Takeo, Eishun,   Inayoshi, Kohei,   Ohsuga, Ken,   Takahashi, Hiroyuki R.,   Mineshige, Shin
September 2019   Monthly Notices of the Royal Astronomical Society

Feedback from low-luminosity radio galaxies: B2 0258+35

Murthy, Suma,   Morganti, Raffaella,   Oosterloo, Tom,   Schulz, Robert,   Mukherjee, Dipanjan,   Wagner, Alexander Y.
September 2019  

Clumpy galaxies in cosmological simulations: the effect of ISM model

Inoue, Shigeki,   Yoshida, Naoki
September 2019   Monthly Notices of the Royal Astronomical Society

H$_2$ Ortho-Para Spin Conversion on Inhomogeneous Grain Surfaces

Furuya, Kenji,   Aikawa, Yuri,   Hama, Tetsuya,   Watanabe, Naoki
September 2019   The Astrophysical Journal

Radiative properties of the first galaxies: rapid transition between UV and infrared bright phases

Arata, Shohei,   Yajima, Hidenobu,   Nagamine, Kentaro,   Li, Yuexing,   Khochfar, Sadegh
September 2019   Monthly Notices of the Royal Astronomical Society

Magnetohydrodynamic simulation code CANS+: Assessments and applications

Matsumoto, Yosuke,   Asahina, Yuta,   Kudoh, Yuki,   Kawashima, Tomohisa,   Matsumoto, Jin,   Takahashi, Hiroyuki R.
August 2019   Publications of the Astronomical Society of Japan

On the dynamics and survival of fractal clouds in galactic winds

Banda-Barragán, W.~E.,   Zertuche, F.~J.,   Federrath, C.,   Garcı́a Del Valle, J.,   Brüggen, M.,   Wagner, A.~Y.
July 2019   Monthly Notices of the Royal Astronomical Society

Jets blowing bubbles in the young radio galaxy 4C 31.04

Zovaro, Henry R.~M.,   Sharp, Robert,   Nesvadba, Nicole P.~H.,   Bicknell, Geoffrey V.,   Mukherjee, Dipanjan,   Wagner, Alexand er Y.
April 2019   Monthly Notices of the Royal Astronomical Society

Osaka feedback model: isolated disc galaxy simulations

Shimizu, Ikkoh,   Todoroki, Keita,   Yajima, Hidenobu,   Nagamine, Kentaro
April 2019   Monthly Notices of the Royal Astronomical Society

Systematic two-dimensional radiation-hydrodynamic simulations of super-Eddington accretion flow and outflow: Comparison with the slim disk model

Kitaki, Takaaki,   Mineshige, Shin,   Ohsuga, Ken,   Kawashima, Tomohisa
December 2018   Publications of the Astronomical Society of Japan

Probing the high-redshift universe with SPICA: Toward the epoch of reionisation and beyond

Egami, E.,   Gallerani, S.,   Schneider, R.,   Pallottini, A.,   Vallini, L.,   Sobacchi, E.
December 2018   Publications of the Astronomical Society of Australia

A Cool Core Disturbed: Observational Evidence for the Coexistence of Subsonic Sloshing Gas and Stripped Shock-heated Gas around the Core of RX J1347.5-1145

Ueda, Shutaro,   Kitayama, Tetsu,   Oguri, Masamune,   Komatsu, Eiichiro,   Akahori, Takuya,   Iono, Daisuke
October 2018   The Astrophysical Journal

Linking interstellar and cometary O$_2$: a deep search for $^16$O$^18$O in the solar-type protostar IRAS 16293-2422

Taquet, V.,   van Dishoeck, E.~F.,   Swayne, M.,   Harsono, D.,   Jørgensen, J.~K.,   Maud, L.
October 2018  

Relativistic jet feedback - III. Feedback on gas discs

Mukherjee, Dipanjan,   Bicknell, Geoffrey V.,   Wagner, Alexand er Y.,   Sutherland, Ralph S.,   Silk, Joseph
October 2018   Monthly Notices of the Royal Astronomical Society

Extreme gaseous outflows in radio-loud narrow-line Seyfert 1 galaxies

Komossa, S.,   Xu, D.~W.,   Wagner, A.~Y.
July 2018   Monthly Notices of the Royal Astronomical Society

Depletion of $^15$N in the center of L1544: Early transition from atomic to molecular nitrogen?

Furuya, K.,   Watanabe, Y.,   Sakai, T.,   Aikawa, Y.,   Yamamoto, S.
July 2018  

SILVERRUSH. VI. A simulation of Ly\ensuremathα emitters in the reionization epoch and a comparison with Subaru Hyper Suprime-Cam survey early data

Inoue, Akio K.,   Hasegawa, Kenji,   Ishiyama, Tomoaki,   Yajima, Hidenobu,   Shimizu, Ikkoh,   Umemura, Masayuki
June 2018   Publications of the Astronomical Society of Japan

Tracing the atomic nitrogen abundance in star-forming regions with ammonia deuteration

Furuya, Kenji,   Persson, Magnus V.
June 2018   Monthly Notices of the Royal Astronomical Society

AGN feedback compared: jets versus radiation

Cielo, Salvatore,   Bieri, Rebekka,   Volonteri, Marta,   Wagner, Alexander Y.,   Dubois, Yohan
June 2018   Monthly Notices of the Royal Astronomical Society

Magnetohydrodynamic Simulations of a Plunging Black Hole into a Molecular Cloud

Nomura, Mariko,   Oka, Tomoharu,   Yamada, Masaya,   Takekawa, Shunya,   Ohsuga, Ken,   Takahashi, Hiroyuki R.
May 2018   The Astrophysical Journal

The jet-ISM interactions in IC 5063

Mukherjee, Dipanjan,   Wagner, Alexander Y.,   Bicknell, Geoffrey V.,   Morganti, Raffaella,   Oosterloo, Tom,   Nesvadba, Nicole
May 2018   Monthly Notices of the Royal Astronomical Society

SEURAT: SPH scheme extended with ultraviolet line radiative transfer

Abe, Makito,   Suzuki, Hiroyuki,   Hasegawa, Kenji,   Semelin, Benoit,   Yajima, Hidenobu,   Umemura, Masayuki
May 2018   Monthly Notices of the Royal Astronomical Society

ALMA Observations of the IRDC Clump G34.43+00.24 MM3: Complex Organic and Deuterated Molecules

Sakai, Takeshi,   Yanagida, Takahiro,   Furuya, Kenji,   Aikawa, Yuri,   Sanhueza, Patricio,   Sakai, Nami
April 2018   The Astrophysical Journal

MAGI: many-component galaxy initializer

Miki, Yohei,   Umemura, Masayuki
April 2018   Monthly Notices of the Royal Astronomical Society

Depletion of Heavy Nitrogen in the Cold Gas of Star-forming Regions

Furuya, Kenji,   Aikawa, Yuri
April 2018   The Astrophysical Journal

Relativistic jet feedback - II. Relationship to gigahertz peak spectrum and compact steep spectrum radio galaxies

Bicknell, Geoffrey V.,   Mukherjee, Dipanjan,   Wagner, Alexand er Y.,   Sutherland, Ralph S.,   Nesvadba, Nicole P.~H.
April 2018   Monthly Notices of the Royal Astronomical Society

First-principles study of the formation of glycine-producing radicals from common interstellar species

Sato, Akimasa,   Kitazawa, Yuya,   Ochi, Toshiro,   Shoji, Mitsuo,   Komatsu, Yu,   Kayanuma, Megumi
March 2018  

Multiple Paths of Deuterium Fractionation in Protoplanetary Disks

Aikawa, Yuri,   Furuya, Kenji,   Hincelin, Ugo,   Herbst, Eric
March 2018   The Astrophysical Journal

Systematic Identification of LAEs for Visible Exploration and Reionization Research Using Subaru HSC (SILVERRUSH). I. Program strategy and clustering properties of ̃2000 Ly\ensuremathα emitters at z = 6-7 over the 0.3-0.5 Gpc$^2$ survey area

Ouchi, Masami,   Harikane, Yuichi,   Shibuya, Takatoshi,   Shimasaku, Kazuhiro,   Taniguchi, Yoshiaki,   Konno, Akira
January 2018   Publications of the Astronomical Society of Japan

Ionized Gas Outflows in Infrared-bright Dust-obscured Galaxies Selected with WISE and SDSS

Toba, Yoshiki,   Bae, Hyun-Jin,   Nagao, Tohru,   Woo, Jong-Hak,   Wang, Wei-Hao,   Wagner, Alexander Y.
December 2017   The Astrophysical Journal

Multidimensional Vlasov-Poisson Simulations with High-order Monotonicity- and Positivity-preserving Schemes

Tanaka, Satoshi,   Yoshikawa, Kohji,   Minoshima, Takashi,   Yoshida, Naoki
November 2017   The Astrophysical Journal

A theoretical study of the formation of glycine via hydantoin intermediate in outer space environment

Kayanuma, Megumi,   Kidachi, Kaori,   Shoji, Mitsuo,   Komatsu, Yu,   Sato, Akimasa,   Shigeta, Yasuteru
November 2017  

ALMA Observations of the Protostar L1527 IRS: Probing Details of the Disk and the Envelope Structures

Aso, Yusuke,   Ohashi, Nagayoshi,   Aikawa, Yuri,   Machida, Masahiro N.,   Saigo, Kazuya,   Saito, Masao
November 2017   The Astrophysical Journal

Complex organics in IRAS 4A revisited with ALMA and PdBI: Striking contrast between two neighbouring protostellar cores

López-Sepulcre, A.,   Sakai, N.,   Neri, R.,   Imai, M.,   Oya, Y.,   Ceccarelli, C.
October 2017  

The Formation and Physical Origin of Highly Ionized Cooling Gas

Bordoloi, Rongmon,   Wagner, Alexander Y.,   Heckman, Timothy M.,   Norman, Colin A.
October 2017   The Astrophysical Journal

The nature of the progenitor of the M31 north-western stream: globular clusters as milestones of its orbit

Kirihara, T.,   Miki, Y.,   Mori, M.
August 2017   Monthly Notices of the Royal Astronomical Society

Universal Dark Halo Scaling Relation for the Dwarf Spheroidal Satellites

Hayashi, Kohei,   Ishiyama, Tomoaki,   Ogiya, Go,   Chiba, Masashi,   Inoue, Shigeki,   Mori, Masao
July 2017   The Astrophysical Journal

NH$_3$ (1$_0$-0$_0$) in the pre-stellar core L1544

Caselli, P.,   Bizzocchi, L.,   Keto, E.,   Sipilä, O.,   Tafalla, M.,   Pagani, L.
July 2017  

L483: Warm Carbon-chain Chemistry Source Harboring Hot Corino Activity

Oya, Yoko,   Sakai, Nami,   Watanabe, Yoshimasa,   Higuchi, Aya E.,   Hirota, Tomoya,   López-Sepulcre, Ana
March 2017   The Astrophysical Journal

Effects of Grain Growth on Molecular Abundances in Young Stellar Objects

Harada, Nanase,   Hasegawa, Yasuhiro,   Aikawa, Yuri,   Hirashita, Hiroyuki,   Liu, Haoyu Baobab,   Hirano, Naomi
March 2017   The Astrophysical Journal

Water delivery from cores to disks: Deuteration as a probe of the prestellar inheritance of H$_2$O

Furuya, K.,   Drozdovskaya, M.~N.,   Visser, R.,   van Dishoeck, E.~F.,   Walsh, C.,   Harsono, D.
March 2017  

ALMA Reveals Strong [C II] Emission in a Galaxy Embedded in a Giant Ly\ensuremathα Blob at z = 3.1

Umehata, Hideki,   Matsuda, Yuichi,   Tamura, Yoichi,   Kohno, Kotaro,   Smail, Ian,   Ivison, R.~J.
January 2017   The Astrophysical Journal Letters

Outflows driven by quasars in high-redshift galaxies with radiation hydrodynamics

Bieri, Rebekka,   Dubois, Yohan,   Rosdahl, Joakim,   Wagner, Alexander,   Silk, Joseph,   Mamon, Gary A.
January 2017   Monthly Notices of the Royal Astronomical Society

Following the Interstellar History of Carbon: From the Interiors of Stars to the Surfaces of Planets

Ziurys, L.~M.,   Halfen, D.~T.,   Geppert, W.,   Aikawa, Y.
December 2016  

Cosmology with the Square Kilometre Array by SKA-Japan

Yamauchi, Daisuke,   Ichiki, Kiyotomo,   Kohri, Kazunori,   Namikawa, Toshiya,   Oyama, Yoshihiko,   Sekiguchi, Toyokazu
December 2016   Publications of the Astronomical Society of Japan

ALMA Reveals the Anatomy of the mm-sized Dust and Molecular Gas in the HD 97048 Disk

Walsh, Catherine,   Juhász, Attila,   Meeus, Gwendolyn,   Dent, William R.~F.,   Maud, Luke T.,   Aikawa, Yuri
November 2016   The Astrophysical Journal

Spectral Line Survey toward a Molecular Cloud in IC10

Nishimura, Yuri,   Shimonishi, Takashi,   Watanabe, Yoshimasa,   Sakai, Nami,   Aikawa, Yuri,   Kawamura, Akiko
October 2016   The Astrophysical Journal

The Sunyaev-Zel'dovich effect at 5″: RX J1347.5-1145 imaged by ALMA

Kitayama, Tetsu,   Ueda, Shutaro,   Takakuwa, Shigehisa,   Tsutsumi, Takahiro,   Komatsu, Eiichiro,   Akahori, Takuya
October 2016   Publications of the Astronomical Society of Japan

Discovery of a Hot Corino in the Bok Globule B335

Imai, Muneaki,   Sakai, Nami,   Oya, Yoko,   López-Sepulcre, Ana,   Watanabe, Yoshimasa,   Ceccarelli, Cecilia
October 2016   The Astrophysical Journal Letters

Collision Tomography: Physical Properties of Possible Progenitors of the Andromeda Stellar Stream

Miki, Yohei,   Mori, Masao,   Rich, R. Michael
August 2016   The Astrophysical Journal

Sub-parsec-scale dynamics of a dusty gas disc exposed to anisotropic AGN radiation with frequency-dependent radiative transfer

Namekata, Daisuke,   Umemura, Masayuki
July 2016   Monthly Notices of the Royal Astronomical Society

First Detection of Gas-phase Methanol in a Protoplanetary Disk

Walsh, Catherine,   Loomis, Ryan A.,   Öberg, Karin I.,   Kama, Mihkel,   van 't Hoff, Merel L.~R.,   Millar, Tom J.
May 2016   The Astrophysical Journal Letters

Jet-intracluster medium interaction in Hydra A - II. The effect of jet precession

Nawaz, M.~A.,   Bicknell, G.~V.,   Wagner, A.~Y.,   Sutherland , R.~S.,   McNamara, B.~R.
May 2016   Monthly Notices of the Royal Astronomical Society

Subarcsecond Analysis of the Infalling-Rotating Envelope around the Class I Protostar IRAS 04365+2535

Sakai, Nami,   Oya, Yoko,   López-Sepulcre, Ana,   Watanabe, Yoshimasa,   Sakai, Takeshi,   Hirota, Tomoya
April 2016   The Astrophysical Journal Letters

Statistical properties of diffuse Ly\ensuremathα haloes around star-forming galaxies at z ̃ 2

Momose, Rieko,   Ouchi, Masami,   Nakajima, Kimihiko,   Ono, Yoshiaki,   Shibuya, Takatoshi,   Shimasaku, Kazuhiro
April 2016   Monthly Notices of the Royal Astronomical Society

Galaxy-scale AGN feedback - theory

Wagner, A.~Y.,   Bicknell, G.~V.,   Umemura, M.,   Sutherland , R.~S.,   Silk, J.
February 2016  

Radiation hydrodynamic simulations of line-driven disk winds for ultra-fast outflows

Nomura, Mariko,   Ohsuga, Ken,   Takahashi, Hiroyuki R.,   Wada, Keiichi,   Yoshida, Tessei
February 2016   Publications of the Astronomical Society of Japan

Spectral Line Survey toward Molecular Clouds in the Large Magellanic Cloud

Nishimura, Yuri,   Shimonishi, Takashi,   Watanabe, Yoshimasa,   Sakai, Nami,   Aikawa, Yuri,   Kawamura, Akiko
February 2016   The Astrophysical Journal

Reconstructing the history of water ice formation from HDO/H$_2$O and D$_2$O/HDO ratios in protostellar cores

Furuya, K.,   van Dishoeck, E.~F.,   Aikawa, Y.
February 2016  

Water deuteration and ortho-to-para nuclear spin ratio of H$_2$ in molecular clouds formed via the accumulation of H I gas

Furuya, K.,   Aikawa, Y.,   Hincelin, U.,   Hassel, G.~E.,   Bergin, E.~A.,   Vasyunin, A.~I.
December 2015  

Double DCO$^+$ Rings Reveal CO Ice Desorption in the Outer Disk Around IM Lup

Öberg, Karin I.,   Furuya, Kenji,   Loomis, Ryan,   Aikawa, Yuri,   Andrews, Sean M.,   Qi, Chunhua
September 2015   The Astrophysical Journal

A new ray-tracing scheme for 3D diffuse radiation transfer on highly parallel architectures

Tanaka, Satoshi,   Yoshikawa, Kohji,   Okamoto, Takashi,   Hasegawa, Kenji
August 2015   Publications of the Astronomical Society of Japan

Early cosmic merger of multiple black holes

Tagawa, H.,   Umemura, M.,   Gouda, N.,   Yano, T.,   Yamai, Y.
August 2015   Monthly Notices of the Royal Astronomical Society

Light absorption efficiencies of photosynthetic pigments: the dependence on spectral types of central stars

Komatsu, Yu,   Umemura, Masayuki,   Shoji, Mitsuo,   Kayanuma, Megumi,   Yabana, Kazuhiro,   Shiraishi, Kenji
July 2015  

Analytical Formulae of Molecular Ion Abundances and the N$_2$H$^+$ Ring in Protoplanetary Disks

Aikawa, Yuri,   Furuya, Kenji,   Nomura, Hideko,   Qi, Chunhua
July 2015   The Astrophysical Journal

Light absorption and excitation energy transfer calculations in primitive photosynthetic bacteria

Komatsu, Yu,   Kayanuma, Megumi,   Shoji, Mitsuo,   Yabana, Kazuhiro,   Shiraishi, Kenji,   Umemura, Masayuki
June 2015  

IL-1 receptor antagonist-deficient mice develop autoimmune arthritis due to intrinsic activation of IL-17-producing CCR2$^+$V\ensuremathγ6$^+$\ensuremathγ\ensuremathδ T cells

Akitsu, Aoi,   Ishigame, Harumichi,   Kakuta, Shigeru,   Chung, Soo-Hyun,   Ikeda, Satoshi,   Shimizu, Kenji
June 2015  

Puzzling outer-density profile of the dark matter halo in the Andromeda galaxy

Kirihara, Takanobu,   Miki, Yohei,   Mori, Masao
December 2014   Publications of the Astronomical Society of Japan

Multi-dimensional Simulations of the Expanding Supernova Remnant of SN 1987A

Potter, T.~M.,   Staveley-Smith, L.,   Reville, B.,   Ng, C. -Y.,   Bicknell, G.~V.,   Sutherland, R.~S.
October 2014   The Astrophysical Journal

Jet-intracluster medium interaction in Hydra A - I. Estimates of jet velocity from inner knots

Nawaz, M.~A.,   Wagner, A.~Y.,   Bicknell, G.~V.,   Sutherland , R.~S.,   McNamara, B.~R.
October 2014   Monthly Notices of the Royal Astronomical Society

Transonic galactic outflows in a dark matter halo with a central black hole and its application to the Sombrero galaxy

Igarashi, Asuka,   Mori, Masao,   Nitta, Shin-ya
October 2014   Monthly Notices of the Royal Astronomical Society

The Core-Cusp Problem in Cold Dark Matter Halos and Supernova Feedback: Effects of Oscillation

Ogiya, Go,   Mori, Masao
September 2014   The Astrophysical Journal

On the evolution of gas clouds exposed to AGN radiation - I. Three-dimensional radiation hydrodynamic simulations

Namekata, D.,   Umemura, M.,   Hasegawa, K.
September 2014   Monthly Notices of the Royal Astronomical Society

Relics of Galaxy Merging: Observational Predictions for a Wandering Massive Black Hole and Accompanying Star Cluster in the Halo of M31

Kawaguchi, Toshihiro,   Saito, Yuriko,   Miki, Yohei,   Mori, Masao
July 2014   The Astrophysical Journal Letters

What is the Physical Origin of Strong Ly\ensuremathα Emission? I. Demographics of Ly\ensuremathα Emitter Structures

Shibuya, Takatoshi,   Ouchi, Masami,   Nakajima, Kimihiko,   Yuma, Suraphong,   Hashimoto, Takuya,   Shimasaku, Kazuhiro
April 2014   The Astrophysical Journal

Hunting a Wandering Supermassive Black Hole in the M31 Halo Hermitage

Miki, Yohei,   Mori, Masao,   Kawaguchi, Toshihiro,   Saito, Yuriko
March 2014   The Astrophysical Journal

First Systematic Search for Oxygen-line Blobs at High Redshift: Uncovering AGN Feedback and Star Formation Quenching

Yuma, Suraphong,   Ouchi, Masami,   Drake, Alyssa B.,   Simpson, Chris,   Shimasaku, Kazuhiro,   Nakajima, Kimihiko
December 2013   The Astrophysical Journal

Highly scalable implementation of an N-body code on a GPU cluster

Miki, Yohei,   Takahashi, Daisuke,   Mori, Masao
September 2013  

Transonic solutions of isothermal galactic winds in a cold dark matter halo

Tsuchiya, Masami,   Mori, Masao,   Nitta, Shin-ya
July 2013   Monthly Notices of the Royal Astronomical Society

Phantom-GRAPE: Numerical software library to accelerate collisionless N-body simulation with SIMD instruction set on x86 architecture

Tanikawa, Ataru,   Yoshikawa, Kohji,   Nitadori, Keigo,   Okamoto, Takashi
February 2013   New Astronomy

New Class of Very High Energy \ensuremathγ-Ray Emitters: Radio-dark Mini Shells Surrounding Active Galactic Nucleus Jets

Kino, Motoki,   Ito, Hirotaka,   Kawakatu, Nozomu,   Orienti, Monica
February 2013   The Astrophysical Journal

Direct Integration of the Collisionless Boltzmann Equation in Six-dimensional Phase Space: Self-gravitating Systems

Yoshikawa, Kohji,   Yoshida, Naoki,   Umemura, Masayuki
January 2013   The Astrophysical Journal

Ultrafast Outflows: Galaxy-scale Active Galactic Nucleus Feedback

Wagner, A.~Y.,   Umemura, M.,   Bicknell, G.~V.
January 2013   The Astrophysical Journal Letters

A high-resolution study of the X-ray emission and Sunyaev-Zel'dovich effect in the Bullet cluster (1E 0657-56)

Prokhorov, D.~A.,   Million, E.~T.,   Akahori, T.,   Zemcov, M.,   Moraghan, A.,   Nagataki, S.
November 2012   Monthly Notices of the Royal Astronomical Society

Kiloparsec-scale Radio Structures in Narrow-line Seyfert 1 Galaxies

Doi, Akihiro,   Nagira, Hiroshi,   Kawakatu, Nozomu,   Kino, Motoki,   Nagai, Hiroshi,   Asada, Keiichi
November 2012   The Astrophysical Journal

Imaging Simulations of the Sunyaev-Zel'dovich Effect for ALMA

Yamada, Kenkichi,   Kitayama, Tetsu,   Takakuwa, Shigehisa,   Iono, Daisuke,   Tsutsumi, Takahiro,   Kohno, Kotaro
October 2012   Publications of the Astronomical Society of Japan

Driving Outflows with Relativistic Jets and the Dependence of Active Galactic Nucleus Feedback Efficiency on Interstellar Medium Inhomogeneity

Wagner, A.~Y.,   Bicknell, G.~V.,   Umemura, M.
October 2012   The Astrophysical Journal

ORIGIN: metal creation and evolution from the cosmic dawn

den Herder, Jan-Willem,   Piro, Luigi,   Ohashi, Takaya,   Kouveliotou, Chryssa,   Hartmann, Dieter H.,   Kaastra, Jelle S.
October 2012  

Diffuse Ly\ensuremathα haloes around Ly\ensuremathα emitters at z=3: do dark matter distributions determine the Ly\ensuremathα spatial extents?

Matsuda, Y.,   Yamada, T.,   Hayashino, T.,   Yamauchi, R.,   Nakamura, Y.,   Morimoto, N.
September 2012   Monthly Notices of the Royal Astronomical Society

Calorimetry of Active Galactic Nucleus Jets: Testing Plasma Composition in Cygnus A

Kino, M.,   Kawakatu, N.,   Takahara, F.
June 2012   The Astrophysical Journal

Investigating Slim Disk Solutions for HLX-1 in ESO 243-49

Godet, O.,   Plazolles, B.,   Kawaguchi, T.,   Lasota, J. -P.,   Barret, D.,   Farrell, S.~A.
June 2012   The Astrophysical Journal

Profiles of Ly\ensuremathα Emission Lines of the Emitters at z = 3.1

Yamada, T.,   Matsuda, Y.,   Kousai, K.,   Hayashino, T.,   Morimoto, N.,   Umemura, M.
May 2012   The Astrophysical Journal

Panoramic Survey of Ly\ensuremathα Emitters at z = 3.1

Yamada, T.,   Nakamura, Y.,   Matsuda, Y.,   Hayashino, T.,   Yamauchi, R.,   Morimoto, N.
April 2012   The Astronomical Journal

N-body simulation for self-gravitating collisional systems with a new SIMD instruction set extension to the x86 architecture, Advanced Vector eXtensions

Tanikawa, Ataru,   Yoshikawa, Kohji,   Okamoto, Takashi,   Nitadori, Keigo
February 2012   New Astronomy

ARGOT: accelerated radiative transfer on grids using oct-tree

Okamoto, Takashi,   Yoshikawa, Kohji,   Umemura, Masayuki
February 2012   Monthly Notices of the Royal Astronomical Society

Stereo pairs in Astrophysics

Vogt, Frédéric,   Wagner, Alexander Y.
January 2012   Applied Surface Science

New method for exploring super-Eddington active galactic nuclei by near-infrared observations

Kawakatu, N.,   Ohsuga, K.
November 2011   Monthly Notices of the Royal Astronomical Society

A high-frequency study of the Sunyaev-Zel'dovich effect morphology in galaxy clusters

Prokhorov, D.~A.,   Colafrancesco, S.,   Akahori, T.,   Million, E.~T.,   Nagataki, S.,   Yoshikawa, K.
September 2011   Monthly Notices of the Royal Astronomical Society

Unveiling the 3D temperature structure of galaxy clusters by means of the thermal Sunyaev-Zel'dovich effect

Prokhorov, D.~A.,   Dubois, Y.,   Nagataki, S.,   Akahori, T.,   Yoshikawa, K.
August 2011   Monthly Notices of the Royal Astronomical Society

Near-infrared Reverberation by Dusty Clumpy Tori in Active Galactic Nuclei

Kawaguchi, Toshihiro,   Mori, Masao
August 2011   The Astrophysical Journal

The Core-Cusp Problem in Cold Dark Matter Halos and Supernova Feedback: Effects of Mass Loss

Ogiya, Go,   Mori, Masao
July 2011   The Astrophysical Journal Letters

Can electron distribution functions be derived through the Sunyaev-Zel'dovich effect?

Prokhorov, D.~A.,   Colafrancesco, S.,   Akahori, T.,   Yoshikawa, K.,   Nagataki, S.,   Seon, K. -I.
May 2011  

Evolution of Non-thermal Shell Emission Associated with Active Galactic Nucleus Jets

Ito, Hirotaka,   Kino, Motoki,   Kawakatu, Nozomu,   Yamada, Shoichi
April 2011   The Astrophysical Journal

Infrared 3-4\ensuremathμm Spectroscopy of Nearby PG QSOs and AGN-Nuclear Starburst Connections in High-luminosity AGN Populations

Imanishi, Masatoshi,   Ichikawa, Kohei,   Takeuchi, Tomoe,   Kawakatu, Nozomu,   Oi, Nagisa,   Imase, Keisuke
March 2011   Publications of the Astronomical Society of Japan

Successive Merger of Multiple Massive Black Holes in a Primordial Galaxy

Tanikawa, A.,   Umemura, M.
February 2011   The Astrophysical Journal Letters

The Subaru Ly\ensuremathα blob survey: a sample of 100-kpc Ly\ensuremathα blobs at z = 3

Matsuda, Y.,   Yamada, T.,   Hayashino, T.,   Yamauchi, R.,   Nakamura, Y.,   Morimoto, N.
January 2011   Monthly Notices of the Royal Astronomical Society

Orientation Effects on the Inner Region of Dusty Torus of Active Galactic Nuclei

Kawaguchi, Toshihiro,   Mori, Masao
December 2010   The Astrophysical Journal Letters

Long-term Spectral Variations of Ultraluminous X-ray Sources in the Interacting Galaxy Systems M 51 and NGC 4490/85

Yoshida, Tessei,   Ebisawa, Ken,   Matsushita, Kyoko,   Tsujimoto, Masahiro,   Kawaguchi, Toshihiro
October 2010   The Astrophysical Journal

START: smoothed particle hydrodynamics with tree-based accelerated radiative transfer

Hasegawa, K.,   Umemura, M.
October 2010   Monthly Notices of the Royal Astronomical Society

Two types of Lyman \ensuremathα emitters envisaged from hierarchical galaxy formation

Shimizu, Ikkoh,   Umemura, Masayuki
August 2010   Monthly Notices of the Royal Astronomical Society

Hydrodynamic Simulations of Merging Galaxy Clusters: Non-Equilibrium Ionization State and Two-Temperature Structure

Akahori, Takuya,   Yoshikawa, Kohji
April 2010   Publications of the Astronomical Society of Japan

Three-dimensional radiative properties of hot accretion flows on to the Galactic Centre black hole

Kato, Y.,   Umemura, M.,   Ohsuga, K.
December 2009   Monthly Notices of the Royal Astronomical Society

Cosmological radiative transfer comparison project - II. The radiation-hydrodynamic tests

Iliev, Ilian T.,   Whalen, Daniel,   Mellema, Garrelt,   Ahn, Kyungjin,   Baek, Sunghye,   Gnedin, Nickolay Y.
December 2009   Monthly Notices of the Royal Astronomical Society

The escape of ionizing photons from supernova-dominated primordial galaxies

Yajima, Hidenobu,   Umemura, Masayuki,   Mori, Masao,   Nakamoto, Taishi
September 2009   Monthly Notices of the Royal Astronomical Society

Formation Criteria and the Mass of Secondary Population III Stars

Susa, Hajime,   Umemura, Masayuki,   Hasegawa, Kenji
September 2009   The Astrophysical Journal

Formation of globular clusters induced by external ultraviolet radiation

Hasegawa, Kenji,   Umemura, Masayuki,   Kitayama, Tetsu
August 2009   Monthly Notices of the Royal Astronomical Society

Global Radiation-Magnetohydrodynamic Simulations of Black-Hole Accretion Flow and Outflow: Unified Model of Three States

Ohsuga, Ken,   Mineshige, Shin,   Mori, Masao,   Kato, Yoshiaki
June 2009   Publications of the Astronomical Society of Japan

Radiative regulation of Population III star formation

Hasegawa, K.,   Umemura, M.,   Susa, H.
May 2009   Monthly Notices of the Royal Astronomical Society

Modeling Nonlinear Evolution of Baryon Acoustic Oscillations: Convergence Regime of N-body Simulations and Analytic Models

Nishimichi, Takahiro,   Shirata, Akihito,   Taruya, Atsushi,   Yahata, Kazuhiro,   Saito, Shun,   Suto, Yasushi
February 2009   Publications of the Astronomical Society of Japan

Kinematic and Chemical Constraints on the Formation of M31's Inner and Outer Halo

Koch, Andreas,   Rich, R. Michael,   Reitzel, David B.,   Martin, Nicolas F.,   Ibata, Rodrigo A.,   Chapman, Scott C.
December 2008   The Astrophysical Journal

Suzaku broad-band spectroscopy of RX J1347.5-1145: constraints on the extremely hot gas and non-thermal emission

Ota, N.,   Murase, K.,   Kitayama, T.,   Komatsu, E.,   Hattori, M.,   Matsuo, H.
November 2008  

Non-Equilibrium Ionization State and Two-Temperature Structure in the Linked Region of Abell 399 and Abell 401

Akahori, Takuya,   Yoshikawa, Kohji
August 2008   Publications of the Astronomical Society of Japan

The impact of a supernova explosion in a very massive binary

Sato, Jun'ichi,   Umemura, Masayuki,   Sawada, Keisuke
July 2008   Monthly Notices of the Royal Astronomical Society

Nuclear/Circumnuclear Starbursts and Active Galactic Nucleus Mass Accretion in Seyfert Galaxies

Watabe, Yasuyuki,   Kawakatu, Nozomu,   Imanishi, Masatoshi
April 2008   The Astrophysical Journal

Coevolution and Downsizing of Supermassive Black Holes and Galactic Bulges

Umemura, Masayuki
January 2008  

Galactic winds from primeval galaxies

Mori, Masao,   Umemura, Masayuki
October 2007   Applied Surface Science

Large-scale structure of short-lived Lyman \ensuremathα emitters

Shimizu, Ikkoh,   Umemura, Masayuki,   Yonehara, Atsunori
September 2007   Monthly Notices of the Royal Astronomical Society

Luminosity Functions of Lyman Break Galaxies at zåisebox-0.5ex~4 and z\i̊sebox-0.5ex~5 in the Subaru Deep Field

Yoshida, Makiko,   Shimasaku, Kazuhiro,   Kashikawa, Nobunari,   Ouchi, Masami,   Okamura, Sadanori,   Ajiki, Masaru
December 2006   The Astrophysical Journal

Formation of SMBHs and QSO evolution

Kawakatu, Nozomu,   Anabuki, Naohisa,   Nagao, Tohru,   Umemura, Masayuki,   Nakagawa, Takao,   Mori, Masao
November 2006   New Astronomy Reviews

Imprint of Gravitational Lensing by Population III Stars in Gamma-Ray Burst Light Curves

Hirose, Y.,   Umemura, M.,   Yonehara, A.,   Sato, J.
October 2006   The Astrophysical Journal

The End of the Reionization Epoch Probed by Ly\ensuremathα Emitters at z = 6.5 in the Subaru Deep Field

Kashikawa, Nobunari,   Shimasaku, Kazuhiro,   Malkan, Matthew A.,   Doi, Mamoru,   Matsuda, Yuichi,   Ouchi, Masami
September 2006   The Astrophysical Journal

Cosmological radiative transfer codes comparison project - I. The static density field tests

Iliev, Ilian T.,   Ciardi, Benedetta,   Alvarez, Marcelo A.,   Maselli, Antonella,   Ferrara, Andrea,   Gnedin, Nickolay Y.
September 2006   Monthly Notices of the Royal Astronomical Society

Secondary Star Formation in a Population III Object

Susa, Hajime,   Umemura, Masayuki
July 2006   The Astrophysical Journal Letters

The evolution of galaxies from primeval irregulars to present-day ellipticals

Mori, Masao,   Umemura, Masayuki
March 2006   Nature

Early metal enrichment and Lyman \ensuremathα emission

Mori, Masao,   Umemura, Masayuki
March 2006   New Astronomy Reviews

Clustering of Lyman Break Galaxies at z = 4 and 5 in the Subaru Deep Field: Luminosity Dependence of the Correlation Function Slope

Kashikawa, Nobunari,   Yoshida, Makiko,   Shimasaku, Kazuhiro,   Nagashima, Masahiro,   Yahagi, Hideki,   Ouchi, Masami
February 2006   The Astrophysical Journal

The Formation of Population III Binaries

Saigo, Kazuya,   Matsumoto, Tomoaki,   Umemura, Masayuki
November 2004   The Astrophysical Journal Letters

Gas stripping by radiation drag from an interstellar cloud

Sato, Jun'ichi,   Umemura, Masayuki,   Sawada, Keisuke,   Matsuyama, Shingo
October 2004   Monthly Notices of the Royal Astronomical Society

A Strong Ly\ensuremathα Emitter at z = 6.33 in the Subaru Deep Field Selected as an i'-Dropout

Nagao, T.,   Taniguchi, Y.,   Kashikawa, N.,   Kodaira, K.,   Kaifu, N.,   Ando, H.
September 2004   The Astrophysical Journal Letters

The Effects of Early Cosmic Reionization on the Substructure Problem in Galactic Halos

Susa, Hajime,   Umemura, Masayuki
July 2004   The Astrophysical Journal Letters

Multiple Supernova Explosions in a Forming Galaxy

Mori, Masao,   Umemura, Masayuki,   Ferrara, Andrea
January 2004   Publications of the Astronomical Society of Australia

Why Are Massive Black Holes Small in Disk Galaxies?

Kawakatu, Nozomu,   Umemura, Masayuki
January 2004   The Astrophysical Journal Letters

The Discovery of Two Lyman \ensuremathα Emitters beyond Redshift 6 in the Subaru Deep Field

Kodaira, Keiichi,   Taniguchi, Yoshiaki,   Kashikawa, Nobunari,   Kaifu, Norio,   Ando, Hiroyasu,   Karoji, Hiroshi
April 2003   Publications of the Astronomical Society of Japan

A Spectrophotometric Method to Determine the Inclination of Class I Objects

Nakazato, Takeshi,   Nakamoto, Taishi,   Umemura, Masayuki
January 2003   The Astrophysical Journal

Protoquasars: Physical States and Observable Properties

Kawakatu, Nozomu,   Umemura, Masayuki,   Mori, Masao
January 2003   The Astrophysical Journal

A Search for Ly\ensuremathα Emitters at Redshift 3.7

Fujita, Shinobu S.,   Ajiki, Masaru,   Shioya, Yasuhiro,   Nagao, Tohru,   Murayama, Takashi,   Taniguchi, Yoshiaki
January 2003   The Astronomical Journal

Does the Slim-Disk Model Correctly Consider Photon-trapping Effects?

Ohsuga, Ken,   Mineshige, Shin,   Mori, Masao,   Umemura, Masayuki
July 2002   The Astrophysical Journal

The Stellar Initial Mass Function in Primordial Galaxies

Nakamura, Fumitaka,   Umemura, Masayuki
April 2002   The Astrophysical Journal

Radiation drag driven mass accretion in a clumpy interstellar medium: implications for the supermassive black hole-to-bulge relation

Kawakatu, Nozomu,   Umemura, Masayuki
January 2002   Monthly Notices of the Royal Astronomical Society

A Radiation-Hydrodynamical Model for Supermassive Black Hole-to-Bulge Mass Relation and Quasar Formation

Umemura, Masayuki
October 2001   The Astrophysical Journal Letters

Criteria for the formation of Population III objects in the ultraviolet background radiation

Kitayama, T.,   Susa, H.,   Umemura, M.,   Ikeuchi, S.
October 2001   Monthly Notices of the Royal Astronomical Society

Theoretical Models of Multi-Waveband QSO Luminosity Functions

Hosokawa, Takashi,   Mineshige, Shin,   Kawaguchi, Toshihiro,   Yoshikawa, Kohji,   Umemura, Masayuki
October 2001   Publications of the Astronomical Society of Japan

Formation of Obscuring Walls by the Radiation Force from Circumnuclear Starbursts and the Implications for the Starburst-Active Galactic Nucleus Connection

Ohsuga, Ken,   Umemura, Masayuki
September 2001   The Astrophysical Journal

Circumnuclear obscuration of the Circinus galaxy by a starburst-radiation supported wall

Ohsuga, K.,   Umemura, M.
June 2001  

The effects of radiative transfer on the reionization of an inhomogeneous universe

Nakamoto, Taishi,   Umemura, Masayuki,   Susa, Hajime
March 2001   Monthly Notices of the Royal Astronomical Society

On the Initial Mass Function of Population III Stars

Nakamura, Fumitaka,   Umemura, Masayuki
February 2001   The Astrophysical Journal

Ultraviolet-background-induced bifurcation of galactic morphology

Susa, Hajime,   Umemura, Masayuki
August 2000   Monthly Notices of the Royal Astronomical Society

Formation of Primordial Galaxies under Ultraviolet Background Radiation

Susa, Hajime,   Umemura, Masayuki
July 2000   The Astrophysical Journal

Radiation-hydrodynamical collapse of pre-galactic clouds in the ultraviolet background

Kitayama, T.,   Tajiri, Y.,   Umemura, M.,   Susa, H.,   Ikeuchi, S.
June 2000   Monthly Notices of the Royal Astronomical Society

An X-ray microlensing test of AU-scale quasar disk structure

Yonehara, A.,   Mineshige, S.,   Manmoto, T.,   Fukue, J.,   Umemura, M.,   Turner, E.~L.
January 2000  

Formation of Large-Scale Obscuring Wall and Active Galactic Nucleus Evolution Regulated by Circumnuclear Starbursts

Ohsuga, Ken,   Umemura, Masayuki
August 1999   The Astrophysical Journal Letters

Radiation Hydrodynamical Mass Accretion onto Galactic Nuclei Driven by Circumnuclear Starbursts

Ohsuga, Ken,   Umemura, Masayuki,   Fukue, Jun,   Mineshige, Shin
June 1999   Publications of the Astronomical Society of Japan

On the Mass of Population III Stars

Nakamura, Fumitaka,   Umemura, Masayuki
April 1999   The Astrophysical Journal

Microlens diagnostics of accretion disks in active galactic nuclei

Yonehara, A.,   Mineshige, S.,   Fukue, J.,   Umemura, M.,   Turner, E.~L.
March 1999  

AGN activity triggered by circumnuclear starbursts

Umemura, Masayuki,   Fukue, Jun,   Mineshige, Shin
January 1999  

Hydrodynamical evolution of AGN driven by radiation from circumnuclear starbursts

Ohsuga, Ken,   Umemura, Masayuki,   Fukue, Jun,   Mineshige, Shin
January 1999  

Radiatively driven mass accretion on to galactic nuclei by circumnuclear starbursts

Umemura, Masayuki,   Fukue, Jun,   Mineshige, Shin
October 1998   Monthly Notices of the Royal Astronomical Society

Optical Variability in Active Galactic Nuclei: Starbursts or Disk Instabilities?

Kawaguchi, T.,   Mineshige, S.,   Umemura, M.,   Turner, Edwin L.
September 1998   The Astrophysical Journal

An X-Ray Microlensing Test of AU-Scale Accretion Disk Structure in Q2237+0305

Yonehara, Atsunori,   Mineshige, Shin,   Manmoto, Tadahiro,   Fukue, Jun,   Umemura, Masayuki,   Turner, Edwin L.
July 1998   The Astrophysical Journal Letters

A Criterion for Photoionization of Pregalactic Clouds Exposed to Diffuse Ultraviolet Background Radiation

Tajiri, Yukiko,   Umemura, Masayuki
July 1998   The Astrophysical Journal

Angular Momentum Transport in Early-formed Objects by Cosmic Background Radiation: Radiation-hydrodynamical Approach

Tsuribe, Tohru,   Umemura, Masayuki
September 1997   The Astrophysical Journal

Self-Similar Viscous Collapse of a Self-Gravitating, Polytropic Gas Disk

Mineshige, Shin,   Nakayama, Kunji,   Umemura, Masayuki
August 1997   Publications of the Astronomical Society of Japan

Very Strong Microlensing of Distant Luminous Stars by Relic Massive Black Holes

Turner, Edwin L.,   Umemura, Masayuki
July 1997   The Astrophysical Journal

Self-similar Collapse of a Self-gravitating Viscous Disk

Mineshige, Shin,   Umemura, Masayuki
May 1997   The Astrophysical Journal