研究成果・発表論文

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

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Kirihara, Takanobu,   Miki, Yohei,   Mori, Masao

The cold dark matter (CDM) cosmology, which is the standard theory of the structure formation in the universe, predicts that the outer density profile of dark matter halos decreases with the cube of distance from the center. However, so far not much ...

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

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

The expanding remnant from SN 1987A is an excellent laboratory for investigating the physics of supernovae explosions. There is still a large number of outstanding questions, such as the reason for the asymmetric radio morphology, the structure of th...

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

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Nawaz, M.~A.,   Wagner, A.~Y.,   Bicknell, G.~V.,   Sutherland , R.~S.,   McNamara, B.~R.

We present the first stage of an investigation of the interactions of the jets in the radio galaxy Hydra A with the intracluster medium. We consider the jet kinetic power, the galaxy and cluster atmosphere and the inner structure of the radio source....

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

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Igarashi, Asuka,   Mori, Masao,   Nitta, Shin-ya

We have classified possible transonic solutions of galactic outflows in the gravitational potential of the dark matter halo (DMH) and supermassive black hole (SMBH) under the assumptions of isothermal, spherically symmetric and steady state. It is cl...

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

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Namekata, D.,   Umemura, M.,   Hasegawa, K.

We perform three-dimensional radiation hydrodynamic simulations of uniform dusty gas clouds irradiated by an active galactic nucleus (AGN) to investigate the dependence of evolution of clouds on the ionization parameter \U\ and the Strömgren number \...

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

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Kawaguchi, Toshihiro,   Saito, Yuriko,   Miki, Yohei,   Mori, Masao

Galaxies and massive black holes (BHs) presumably grow via galactic merging events and subsequent BH coalescence. As a case study, we investigate the merging event between the Andromeda galaxy (M31) and a satellite galaxy. We compute the expected obs...

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

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Shibuya, Takatoshi,   Ouchi, Masami,   Nakajima, Kimihiko,   Yuma, Suraphong,   Hashimoto, Takuya,   Shimasaku, Kazuhiro

We present the results of structure analyses for a large sample of 426 Ly\ensuremathα emitters (LAEs) at z åisebox-0.5ex~ 2.2 that are observed with the Hubble Space Telescope/Advanced Camera for Surveys and WFC3-IR during deep extra-galactic legacy ...

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

Kirihara, Takanobu,   Miki, Yohei,   Mori, Masao

The cold dark matter (CDM) cosmology, which is the standard theory of the structure formation in the universe, predicts that the outer density profile of dark matter halos decreases with the cube of distance from the center. However, so far not much ...

平成26年 12月   Publications of the Astronomical Society of Japan
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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.

The expanding remnant from SN 1987A is an excellent laboratory for investigating the physics of supernovae explosions. There is still a large number of outstanding questions, such as the reason for the asymmetric radio morphology, the structure of th...

平成26年 10月   The Astrophysical Journal
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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.

We present the first stage of an investigation of the interactions of the jets in the radio galaxy Hydra A with the intracluster medium. We consider the jet kinetic power, the galaxy and cluster atmosphere and the inner structure of the radio source....

平成26年 10月   Monthly Notices of the Royal Astronomical Society
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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

We have classified possible transonic solutions of galactic outflows in the gravitational potential of the dark matter halo (DMH) and supermassive black hole (SMBH) under the assumptions of isothermal, spherically symmetric and steady state. It is cl...

平成26年 10月   Monthly Notices of the Royal Astronomical Society
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The Core-Cusp Problem in Cold Dark Matter Halos and Supernova Feedback: Effects of Oscillation

Ogiya, Go,   Mori, Masao

This study investigates the dynamical response of dark matter (DM) halos to recurrent starbursts in forming less-massive galaxies to solve the core-cusp problem. The gas, which is heated by supernova feedback after a starburst, expands and the star f...

平成26年 9月   The Astrophysical Journal
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On the evolution of gas clouds exposed to AGN radiation - I. Three-dimensional radiation hydrodynamic simulations

Namekata, D.,   Umemura, M.,   Hasegawa, K.

We perform three-dimensional radiation hydrodynamic simulations of uniform dusty gas clouds irradiated by an active galactic nucleus (AGN) to investigate the dependence of evolution of clouds on the ionization parameter \U\ and the Strömgren number \...

平成26年 9月   Monthly Notices of the Royal Astronomical Society
Image

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

Galaxies and massive black holes (BHs) presumably grow via galactic merging events and subsequent BH coalescence. As a case study, we investigate the merging event between the Andromeda galaxy (M31) and a satellite galaxy. We compute the expected obs...

平成26年 7月   The Astrophysical Journal Letters
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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

We present the results of structure analyses for a large sample of 426 Ly\ensuremathα emitters (LAEs) at z åisebox-0.5ex~ 2.2 that are observed with the Hubble Space Telescope/Advanced Camera for Surveys and WFC3-IR during deep extra-galactic legacy ...

平成26年 4月   The Astrophysical Journal

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

Kirihara, Takanobu,   Miki, Yohei,   Mori, Masao
平成26年 12月   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.
平成26年 10月   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.
平成26年 10月   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
平成26年 10月   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
平成26年 9月   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.
平成26年 9月   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
平成26年 7月   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
平成26年 4月   The Astrophysical Journal