Monitoring observation of near-infrared flares from supermassive black hole caused by gas accretion
Project/Area Number |
25707012
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Research Category |
Grant-in-Aid for Young Scientists (A)
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Allocation Type | Partial Multi-year Fund |
Research Field |
Astronomy
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Research Institution | Miyagi University of Education (2014-2016) National Astronomical Observatory of Japan (2013) |
Principal Investigator |
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Research Collaborator |
IWAMATSU Atsushi
KAWAMATA Ikumi
ONOZATO Hiroki
ADACHI Rina
SEKI Megumi
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Project Period (FY) |
2013-04-01 – 2017-03-31
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Project Status |
Completed (Fiscal Year 2016)
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Budget Amount *help |
¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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Keywords | 赤外線天文学 / ブラックホール / 銀河系 / 銀河中心核 / 光赤外線天文学 / 宇宙科学 / 分光 |
Outline of Final Research Achievements |
We have carried out near-infrared monitoring observations of the Galactic supermassive black hole, using the IRSF telescope in South Africa. The closest approach of a gas cloud to the supermassive black hole was in around March/April 2013, and flares from the black hole was expected. However, during our monitoring from 2013 to 2015, no clear flaring was detected. The K-band magnitudes of the black hole are fainter than 12 during the period. Our result is consistent with other monitoring observations in radio and X-ray wavelengths. Using the same data sets, we have searched for variable stars in the central 7 arcmin region of our Galaxy. We have found new variable star candidates: 10 Mira variable stars, and one Cepheid variable. They are previously unknown variable stars.
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Report
(5 results)
Research Products
(54 results)
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[Journal Article] V5852 Sgr: an unusual nova possibly associated with the Sagittarius stream2016
Author(s)
E. Aydi, P. Mroz, P. A. Whitelock, S. Mohamed, L. Wyrzykowski, A. Udalski, P. Vaisanen, T. Nagayama, M. Dominik, A. Scholz, H. Onozato, R. E. Williams, S. T. Hodgkin, S. Nishiyama, M. Yamagishi, A. M. S. Smith, T. Ryu, A. Iwamatsu, I. Kawamata
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Journal Title
Monthly Notices of the Royal Astronomical Society
Volume: 461
Issue: 2
Pages: 1529-1538
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Kinematics of Classical Cepheids in the Nuclear Stellar Disk2015
Author(s)
N. Matsunaga, K. Fukue, R. Yamamoto, N. Kobayashi, L. Inno, K. Genovali, G. Bono, J. Baba, M. S. Fujii, S. Kondo, Y. Ikeda, S. Hamano, S. Nishiyama, T. Nagata, W. Aoki, T. Tsujimoto
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Journal Title
The Astrophysical Journal
Volume: 799
Issue: 1
Pages: 46-46
DOI
Related Report
Peer Reviewed
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[Journal Article] Near-IR Imaging Polarimetry toward a Bright-rimmed Cloud: Magnetic Field in SFO 742015
Author(s)
Kusune, Takayoshi; Sugitani, Koji; Miao, Jingqi; Tamura, Motohide; Sato, Yaeko; Kwon, Jungmi; Watanabe, Makoto; Nishiyama, Shogo; Nagayama, Takahiro; Sato, Shuji
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Journal Title
The Astrophysical Journal
Volume: 798
Issue: 1
Pages: 60-75
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Multi-band, Multi-epoch Observations of the Transiting Warm Jupiter WASP-80b2014
Author(s)
Akihiko Fukui, Yui Kawashima, Masahiro Ikoma, Norio Narita, Masahiro Onitsuka, Yoshifusa Ita, Hiroki Onozato, Shogo Nishiyama, Haruka Baba, Tsuguru Ryu, Teruyuki Hirano, et al.
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Journal Title
The Astrophysical Journal
Volume: 790
Issue: 2
Pages: 108-108
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Infrared Doppler instrument (IRD) for the Subaru telescope to search for Earth-like planets around nearby M-dwarfs2014
Author(s)
Kotani, Takayuki; Tamura, Motohide; Suto, Hiroshi; Nishikawa, Jun; Sato, Bun'ei; Aoki, Wako; Usuda, Tomonori; Kurokawa, Takashi; Kashiwagi, Ken; Nishiyama, Shogo; Ikeda, Yuji;…; Kudo, Tomoyuki; Kusakabe, Nobuhiko;…; Hori, Yasunori; Omiya, Masashi;…; Harakawa, Hiroki;…; Hirano, Teruyuki; Kuzuhara, Masayuki et al.
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Journal Title
Proceedings of the SPIE 2014
Volume: 9147
Pages: 914714-914714
DOI
Related Report
Peer Reviewed
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[Journal Article] Magnetically Confined Interstellar Hot Plasma in the Nuclear Bulge of Our Galaxy2013
Author(s)
Nishiyama, S., Yasui, K., Nagata, T., Yoshikawa, T., Uchiyama , H., Schödel, R., Hatano, H., Sato, S., Sugitani, K., Suenaga, T., Kwon, J., Tamura, M.
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Journal Title
The Astrophysical Journal
Volume: 769
Issue: 2
Pages: L28-L28
DOI
Related Report
Peer Reviewed
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[Journal Article] IRSF SIRIUS JHKs Simultaneous Transit Photometry of GJ 1214b2013
Author(s)
Narita, N., Nagayama, T., Suenaga, T., Fukui, A., Ikoma, M., Nakajima, Y., Nishiyama, S., Tamura, M.
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Journal Title
Publications of the Astronomical Society of Japan
Volume: 65
Issue: 2
Pages: 27-27
DOI
Related Report
Peer Reviewed
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