研究成果・発表論文

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

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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 accretio...

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 possibilit...

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 motio...

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 ...

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 co...

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 SILV...

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 direc...

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 ...

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 acceler...

The jet-ISM interactions in IC 5063

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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 interste...

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 (...

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

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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-C...

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 m...

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

Image

Bicknell, Geoffrey V.,   Mukherjee, Dipanjan,   Wagner, Alexand er Y.,   Sutherland, Ralph S.,   Nesvadba, Nicole P.~H.

We propose that Gigahertz Peak Spectrum (GPS) and Compact Steep Spectrum (CSS) radio sources are the signposts of relativistic jet feedback in evolving galaxies. Our simulations of relativistic jets interacting with a warm, inhomogeneous medium, util...

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 accretio...

平成30年 12月   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 possibilit...

平成30年 12月   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 motio...

平成30年 10月   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 ...

平成30年 10月  
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 co...

平成30年 10月   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 s...

平成30年 7月   Monthly Notices of the Royal Astronomical Society
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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 no...

平成30年 7月  
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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 SILV...

平成30年 6月   Publications of the Astronomical Society of Japan
Image

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 direc...

平成30年 6月   Monthly Notices of the Royal Astronomical Society
Image

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 ...

平成30年 6月   Monthly Notices of the Royal Astronomical Society
Image

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 acceler...

平成30年 5月   The Astrophysical Journal
Image

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 interste...

平成30年 5月   Monthly Notices of the Royal Astronomical Society
Image

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 (...

平成30年 5月   Monthly Notices of the Royal Astronomical Society
Image

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-C...

平成30年 4月   The Astrophysical Journal
Image

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 m...

平成30年 4月   Monthly Notices of the Royal Astronomical Society
Image

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. Aro...

平成30年 4月   The Astrophysical Journal
Image

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.

We propose that Gigahertz Peak Spectrum (GPS) and Compact Steep Spectrum (CSS) radio sources are the signposts of relativistic jet feedback in evolving galaxies. Our simulations of relativistic jets interacting with a warm, inhomogeneous medium, util...

平成30年 4月   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
平成30年 12月   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.
平成30年 12月   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
平成30年 10月   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.
平成30年 10月  

Relativistic jet feedback - III. Feedback on gas discs

Mukherjee, Dipanjan,   Bicknell, Geoffrey V.,   Wagner, Alexand er Y.,   Sutherland, Ralph S.,   Silk, Joseph
平成30年 10月   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.
平成30年 7月   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.
平成30年 7月  

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
平成30年 6月   Publications of the Astronomical Society of Japan

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

Furuya, Kenji,   Persson, Magnus V.
平成30年 6月   Monthly Notices of the Royal Astronomical Society

AGN feedback compared: jets versus radiation

Cielo, Salvatore,   Bieri, Rebekka,   Volonteri, Marta,   Wagner, Alexander Y.,   Dubois, Yohan
平成30年 6月   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.
平成30年 5月   The Astrophysical Journal

The jet-ISM interactions in IC 5063

Mukherjee, Dipanjan,   Wagner, Alexander Y.,   Bicknell, Geoffrey V.,   Morganti, Raffaella,   Oosterloo, Tom,   Nesvadba, Nicole
平成30年 5月   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
平成30年 5月   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
平成30年 4月   The Astrophysical Journal

MAGI: many-component galaxy initializer

Miki, Yohei,   Umemura, Masayuki
平成30年 4月   Monthly Notices of the Royal Astronomical Society

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

Furuya, Kenji,   Aikawa, Yuri
平成30年 4月   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.
平成30年 4月   Monthly Notices of the Royal Astronomical Society