研究成果・発表論文

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

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Tanikawa, Ataru,   Yoshikawa, Kohji,   Nitadori, Keigo,   Okamoto, Takashi

We have developed a numerical software library for collisionless N-body simulations named ``Phantom-GRAPE'' which highly accelerates force calculations among particles by use of a new SIMD instruction set extension to the x86 architecture, Advanced V...

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

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Kino, Motoki,   Ito, Hirotaka,   Kawakatu, Nozomu,   Orienti, Monica

We explore non-thermal emission from a shocked interstellar medium, which is identified as an expanding shell, driven by a relativistic jet in active galactic nuclei (AGNs). In this work, we particularly focus on parsec-scale size mini shells surroun...

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

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Yoshikawa, Kohji,   Yoshida, Naoki,   Umemura, Masayuki

We present a scheme for numerical simulations of collisionless self- gravitating systems which directly integrates the Vlasov-Poisson equations in six-dimensional phase space. Using the results from a suite of large-scale numerical simulations, we de...

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

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Prokhorov, D.~A.,   Million, E.~T.,   Akahori, T.,   Zemcov, M.,   Moraghan, A.,   Nagataki, S.

High-resolution imaging of the Sunyaev-Zel'dovich (SZ) effect opens new possibilities for testing the presence of various high-energy particle populations in clusters of galaxies. A detailed X-ray analysis of the 'Bullet cluster' (1E 0657-56) with Ch...

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

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Doi, Akihiro,   Nagira, Hiroshi,   Kawakatu, Nozomu,   Kino, Motoki,   Nagai, Hiroshi,   Asada, Keiichi

We report the finding of kiloparsec (kpc)-scale radio structures in three radio-loud narrow-line Seyfert 1 (NLS1) galaxies from the Faint Images of the Radio Sky at Twenty-centimeters of the Very Large Array, which increases the number of known radio...

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

Image

Yamada, Kenkichi,   Kitayama, Tetsu,   Takakuwa, Shigehisa,   Iono, Daisuke,   Tsutsumi, Takahiro,   Kohno, Kotaro

We present imaging simulations of the Sunyaev-Zel'dovich effect of galaxy clusters for the Atacama Large Millimeter/submillimeter Array (ALMA), including the Atacama Compact Array (ACA). In its most compact configuration at 90 GHz, ALMA will resolve ...

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

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Wagner, A.~Y.,   Bicknell, G.~V.,   Umemura, M.

We examine the detailed physics of the feedback mechanism by relativistic active galactic nucleus (AGN) jets interacting with a two-phase fractal interstellar medium (ISM) in the kpc-scale core of galaxies using 29 three-dimensional grid-based hydrod...

ORIGIN: metal creation and evolution from the cosmic dawn

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

ORIGIN is a proposal for the M3 mission call of ESA aimed at the study of metal creation from the epoch of cosmic dawn. Using high- spectral resolution in the soft X-ray band, ORIGIN will be able to identify the physical conditions of all abundant el...

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

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Matsuda, Y.,   Yamada, T.,   Hayashino, T.,   Yamauchi, R.,   Nakamura, Y.,   Morimoto, N.

Using stacks of Ly\ensuremathα images of 2128 Ly\ensuremathα emitters (LAEs) and 24 proto-cluster UV- selected galaxies (LBGs) at z = 3.1, we examine the surface brightness profiles of Ly\ensuremathα haloes around high-z galaxies as a function of env...

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

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Godet, O.,   Plazolles, B.,   Kawaguchi, T.,   Lasota, J. -P.,   Barret, D.,   Farrell, S.~A.

The hyperluminous X-ray source HLX-1 in the galaxy ESO 243-49, currently the best intermediate-mass black hole (BH) candidate, displays spectral transitions similar to those observed in Galactic BH binaries, but with a luminosity 100-1000 times highe...

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

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Yamada, T.,   Matsuda, Y.,   Kousai, K.,   Hayashino, T.,   Morimoto, N.,   Umemura, M.

We present the results of the observations of the Ly\ensuremathα line profiles of 91 emission-line galaxies at z = 3.1 with a spectral resolution of \ensuremath\ lambda/\ensuremathδ\ensuremathłambda(FWHM) \ensuremath≈1700 or 180 km s$^-1$. A signific...

Panoramic Survey of Ly\ensuremathα Emitters at z = 3.1

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Yamada, T.,   Nakamura, Y.,   Matsuda, Y.,   Hayashino, T.,   Yamauchi, R.,   Morimoto, N.

We present the results of the extensive narrowband survey of Ly\ensuremathα emission-line objects at z = 3.1 in the 1.38 deg$^2$ area surrounding the high-density region of star- forming galaxies at z = 3.09 in the SSA22 field, as well as in the 1.04...

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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

We have developed a numerical software library for collisionless N-body simulations named ``Phantom-GRAPE'' which highly accelerates force calculations among particles by use of a new SIMD instruction set extension to the x86 architecture, Advanced V...

平成25年 2月   New Astronomy
Image

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

We explore non-thermal emission from a shocked interstellar medium, which is identified as an expanding shell, driven by a relativistic jet in active galactic nuclei (AGNs). In this work, we particularly focus on parsec-scale size mini shells surroun...

平成25年 2月   The Astrophysical Journal
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Direct Integration of the Collisionless Boltzmann Equation in Six-dimensional Phase Space: Self-gravitating Systems

Yoshikawa, Kohji,   Yoshida, Naoki,   Umemura, Masayuki

We present a scheme for numerical simulations of collisionless self- gravitating systems which directly integrates the Vlasov-Poisson equations in six-dimensional phase space. Using the results from a suite of large-scale numerical simulations, we de...

平成25年 1月   The Astrophysical Journal
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Ultrafast Outflows: Galaxy-scale Active Galactic Nucleus Feedback

Wagner, A.~Y.,   Umemura, M.,   Bicknell, G.~V.

We show, using global three-dimensional grid-based hydrodynamical simulations, that ultrafast outflows (UFOs) from active galactic nuclei (AGNs) result in considerable feedback of energy and momentum into the interstellar medium (ISM) of the host gal...

平成25年 1月   The Astrophysical Journal Letters
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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.

High-resolution imaging of the Sunyaev-Zel'dovich (SZ) effect opens new possibilities for testing the presence of various high-energy particle populations in clusters of galaxies. A detailed X-ray analysis of the 'Bullet cluster' (1E 0657-56) with Ch...

平成24年 11月   Monthly Notices of the Royal Astronomical Society
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Kiloparsec-scale Radio Structures in Narrow-line Seyfert 1 Galaxies

Doi, Akihiro,   Nagira, Hiroshi,   Kawakatu, Nozomu,   Kino, Motoki,   Nagai, Hiroshi,   Asada, Keiichi

We report the finding of kiloparsec (kpc)-scale radio structures in three radio-loud narrow-line Seyfert 1 (NLS1) galaxies from the Faint Images of the Radio Sky at Twenty-centimeters of the Very Large Array, which increases the number of known radio...

平成24年 11月   The Astrophysical Journal
Image

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

Yamada, Kenkichi,   Kitayama, Tetsu,   Takakuwa, Shigehisa,   Iono, Daisuke,   Tsutsumi, Takahiro,   Kohno, Kotaro

We present imaging simulations of the Sunyaev-Zel'dovich effect of galaxy clusters for the Atacama Large Millimeter/submillimeter Array (ALMA), including the Atacama Compact Array (ACA). In its most compact configuration at 90 GHz, ALMA will resolve ...

平成24年 10月   Publications of the Astronomical Society of Japan
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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.

We examine the detailed physics of the feedback mechanism by relativistic active galactic nucleus (AGN) jets interacting with a two-phase fractal interstellar medium (ISM) in the kpc-scale core of galaxies using 29 three-dimensional grid-based hydrod...

平成24年 10月   The Astrophysical Journal
Image

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.

ORIGIN is a proposal for the M3 mission call of ESA aimed at the study of metal creation from the epoch of cosmic dawn. Using high- spectral resolution in the soft X-ray band, ORIGIN will be able to identify the physical conditions of all abundant el...

平成24年 10月  
Image

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.

Using stacks of Ly\ensuremathα images of 2128 Ly\ensuremathα emitters (LAEs) and 24 proto-cluster UV- selected galaxies (LBGs) at z = 3.1, we examine the surface brightness profiles of Ly\ensuremathα haloes around high-z galaxies as a function of env...

平成24年 9月   Monthly Notices of the Royal Astronomical Society
Image

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

Kino, M.,   Kawakatu, N.,   Takahara, F.

We examine plasma composition of jets in active galactic nuclei through the comparison of the total pressure (P) with partial pressures of electrons and protons in a cocoon. The total pressure is estimated from the analysis of expanding cocoon dynami...

平成24年 6月   The Astrophysical Journal
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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.

The hyperluminous X-ray source HLX-1 in the galaxy ESO 243-49, currently the best intermediate-mass black hole (BH) candidate, displays spectral transitions similar to those observed in Galactic BH binaries, but with a luminosity 100-1000 times highe...

平成24年 6月   The Astrophysical Journal
Image

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.

We present the results of the observations of the Ly\ensuremathα line profiles of 91 emission-line galaxies at z = 3.1 with a spectral resolution of \ensuremath\ lambda/\ensuremathδ\ensuremathłambda(FWHM) \ensuremath≈1700 or 180 km s$^-1$. A signific...

平成24年 5月   The Astrophysical Journal
Image

Panoramic Survey of Ly\ensuremathα Emitters at z = 3.1

Yamada, T.,   Nakamura, Y.,   Matsuda, Y.,   Hayashino, T.,   Yamauchi, R.,   Morimoto, N.

We present the results of the extensive narrowband survey of Ly\ensuremathα emission-line objects at z = 3.1 in the 1.38 deg$^2$ area surrounding the high-density region of star- forming galaxies at z = 3.09 in the SSA22 field, as well as in the 1.04...

平成24年 4月   The Astronomical Journal

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
平成25年 2月   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
平成25年 2月   The Astrophysical Journal

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

Yoshikawa, Kohji,   Yoshida, Naoki,   Umemura, Masayuki
平成25年 1月   The Astrophysical Journal

Ultrafast Outflows: Galaxy-scale Active Galactic Nucleus Feedback

Wagner, A.~Y.,   Umemura, M.,   Bicknell, G.~V.
平成25年 1月   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.
平成24年 11月   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
平成24年 11月   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
平成24年 10月   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.
平成24年 10月   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.
平成24年 10月  

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.
平成24年 9月   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.
平成24年 6月   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.
平成24年 6月   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.
平成24年 5月   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.
平成24年 4月   The Astronomical Journal