2013 Fiscal Year Final Research Report
Studies of Mass-Accreting Black Holes through Broad-Band X-Ray Observations
| Project/Area Number |
23244024
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | The University of Tokyo |
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Principal Investigator |
MAKISHIMA Kazuo 東京大学, 理学(系)研究科(研究院), 教授 (20126163)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAZAWA Kazuhiro 東京大学, 大学院理学系研究科, 講師 (50342621)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | ブラックホール / 宇宙Ｘ線 / 「すざく」 / MAXI / ASTRO-H / コンプトン散乱 |
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| Research Abstract |
Through X-ray observations of mass-accreting black holes with the Suzaku satellite, and the MAXI experiment onboard the International Space Station, we obtained the following results. (1) We successfully reinforced the disk-corona view that describes emission from these objects when their accretion rate is relatively low. (2) Rapid spectral changes were detected from Cygnus X-1 as it displays spiky fast variations. (3) We discovered that the primary hard X-ray emission from Active Galactic Nuclei in fact consists of two distinct components, and revised previous view that regards the emission as a single component. (4) Comparing black holes with accreting neutron stars with weak magnetic fields, a unified description of thermal Comptonization process was constructed. (5) In collaboration with many domestic and foreign institutions, as well as industries, we developed the Soft Gamma-Ray Detector, to be put onboard ASTRO-H which is scheduled for lanch in 2015 as a successor to Suzaku.
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Research Products
(56 results)
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[Journal Article] Evidence for a Cool Disk and Inhomogeneous Coronae from Wide-band Temporal Spectroscopy of CygX-1 with Suzaku2013
Author(s)
Yamada, S., Makishima, K., Done, C., Torii, S., Noda, H. & Sakurai, S
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Journal Title
Publ. Astron. Soc. Japan 65
Volume: ID 80
Pages: 21
DOI
Peer Reviewed
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[Journal Article] Highly Ionized Fe-K Absorption Line from Cygnus X-1 in the High/Soft State Observed with Suzaku2013
Author(s)
Yamada, S., Torii, S., Mineshige, S., Ueda, Y., Kubota, A., Gandhi, P., Done, C., Noda, H., Yoshikawa, A. & Makishima, K
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Journal Title
Astrophys. J. Lett. 767
Volume: id. L35
Pages: 6
DOI
Peer Reviewed
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[Journal Article] Rapid Spectral Changes of Cyg X-1 in the Low/Hard State with Suzaku2013
Author(s)
Yamada, S., Negoro, H., Torii, S., Noda, H., Mineshige, S. & Makishima, K
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Journal Title
Astrophy.J.Lett.767
Volume: id. L34
Pages: 5
DOI
Peer Reviewed
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[Journal Article] Geometry dependence of the light collection efficiency of BGO crystal scintillators read out by Avalanche Photo Diodes2013
Author(s)
Sasano, M., Nishioka, H., Okuyama S., Nakazawa K., Makishima K., YamadaS., Yuasa T., Kataoka J., Fukazawa Y., Hanabata Y. & Hayashi K
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Journal Title
Nuclear Instr. Meth. Phys
Volume: A 715
Pages: 105-111
DOI
Peer Reviewed
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[Journal Article] Accretion Geometry of the Low-Mass X-Ray Binary Aquila X-1 in the Soft and Hard States2012
Author(s)
Sakurai, S., Yamada, S., Torii, S., Noda, H., Nakazawa, K., Makishima, K. & Takahashi, H
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Journal Title
Publ. Astron. Soc. Japan 64
Volume: ID 72
Pages: 12
DOI
Peer Reviewed
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[Journal Article] Suzaku Studies of Wide-Band Spectral Variability of the Bright Type I Seyfert Galaxy Markarian 5092011
Author(s)
Noda, H., Makishima, K., Yamada, S., Torii, S., Sakurai, S. & Nakazawa, K
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Journal Title
Astron. Soc. Japan
Volume: 63
Pages: 449-458
DOI
Peer Reviewed
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[Journal Article] Spectral and Timing Studies of Cyg X-1 in the Low/Hard State with Suzaku2011
Author(s)
Torii, S., Yamada, S., Makishima, K., Sakurai, S. Nakazawa, K., Noda, H., Done, C., Takahashi H. & Gandhi, P
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Journal Title
Publ. Astron. Soc. Japan
Volume: 63S
Pages: S771-S783
DOI
Peer Reviewed
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[Presentation] A Unified Compilation of Thermal Comptonization Processes in Accreting Objects2014
Author(s)
Makishima, K., Zhang, Z., Noda, H., Toii, S., Skurai, S., Kobayashi, S.,Ono, K., Nakazawa, K., Sugizaki, M., Yamada, S. and Kawaguchi, T
Organizer
Suzaku-MAXI Conference : Expanding the Frontiers of the X-ray Universe
Place of Presentation
愛媛大学
Year and Date
20140219-22
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