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Your search keyword '"Motoki, Nakajima"' showing total 4 results
Start Over Author "Motoki, Nakajima" Journal pasj: publications of the astronomical society of japan
4 results on '"Motoki, Nakajima"'

1. Long-Term Monitoring of the Black Hole Binary GX 339-4 in the High/Soft State during the 2010 Outburst with MAXI/GSC

Author

Megumi Shidatsu, Motoko Serino, Naoki Isobe, Hiroki Kitayama, Mikio Morii, Tetsuya Sootome, Tatehiro Mihara, Masaru Matsuoka, Yujin E. Nakagawa, Shiro Ueno, Yoshihiro Ueda, Masaki Ishikawa, Atsumasa Yoshida, Masashi Kimura, Motoki Nakajima, Takahiro Toizumi, Nobuyuki Kawai, Hiroshi Tomida, Kazuo Hiroi, Mitsuhiro Kohama, Takanori Matsumura, Kyohei Yamazaki, Kousuke Sugimori, Hitoshi Negoro, Fumitoshi Suwa, Kazutaka Yamaoka, Satoshi Nakahira, Takayuki Yamamoto, Yohko Tsuboi, Mutsumi Sugizaki, Ryuichi Usui, and Hiroshi Tsunemi

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Accretion (meteorology), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Flux, Binary number, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Radius, Spectral line, Black hole, Soft state, Space and Planetary Science, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::Galaxy Astrophysics, Spin-½
Abstract

著者人数: 32名, Accepted: 2011-09-20, 資料番号: SA1003145000

Published
2011

2. MAXI GSC Monitoring of the Crab Nebula and Pulsar during the GeV Gamma-Ray Flare in 2010 September

Author

Tatehiro Mihara, Mitsuhiro Kohama, Yohko Tsuboi, Motoki Nakajima, Hiroshi Tomida, Kousuke Sugimori, Hitoshi Negoro, Kazuo Hiroi, Fumitoshi Suwa, Nobuyuki Kawai, Ryuichi Usui, Megumi Shidatsu, Yoshihiro Ueda, Takayuki Yamamoto, Satoshi Eguchi, Kyohei Yamazaki, Takanori Matsumura, Arata Daikyuji, Yujin E. Nakagawa, Tetsuya Sootome, Kazutaka Yamaoka, Satoshi Nakahira, Hiroshi Tsunemi, Shiro Ueno, Masashi Kimura, Mikio Morii, Masaki Ishikawa, H. Ozawa, Mutsumi Sugizaki, Akiko Uzawa, Ken Ebisawa, Kazuyoshi Kawasaki, Hiroki Kitayama, Atsumasa Yoshida, Masaru Matsuoka, Naoki Isobe, and Motoko Serino

Subjects
Physics, Crab Nebula, Pulsar, Space and Planetary Science, law, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astronomy, Astronomy and Astrophysics, Astrophysics, Pulse (physics), Flare, law.invention
Abstract

著者人数: 37名, Accepted: 2011-07-20, 資料番号: SA1003146000

Published
2011

3. MAXI Observations of Gamma-ray Bursts

Author

M. Sasaki, Takahiro Toizumi, Fumitoshi Suwa, Hisaki Yamada, Hiroshi Tomida, Ryuichi Usui, Juri Sugimoto, T. Sakamoto, Hitoshi Negoro, Yujin E. Nakagawa, T. Onodera, Makoto Yamauchi, Masaki Ishikawa, K. Ishikawa, Y. Nishimura, K. Fukushima, Y. Nakano, Y. Ogawa, K. Yoshidome, Takayuki Yamamoto, Tatehiro Mihara, Taketoshi Yoshii, Motoki Nakajima, Nobuyuki Kawai, Masanori Ohno, Toshihiro Takagi, Megumi Shidatsu, Kazuhiko Suzuki, Taiki Kawamuro, Satoshi Nakahira, Masashi Kimura, Yoshihiro Ueda, M. Higa, Motoko Serino, Hiroshi Tsunemi, Mutsumi Sugizaki, Yohko Tsuboi, Yutaro Tachibana, Masaru Matsuoka, Atsumasa Yoshida, Shiro Ueno, Mikio Morii, and Kazutaka Yamaoka

Subjects
Physics, High Energy Transient Explorer, Astrophysics::High Energy Astrophysical Phenomena, gamma-ray burst: general, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, S distribution, Astrophysics, methods: data analysis, Space and Planetary Science, medicine, medicine.symptom, Gamma-ray burst, X-rays: bursts, Confusion
Abstract

著者人数: 43名, Accepted: 2014-06-13, 資料番号: SA1140202000

Published
2014

4. Sudden End of X-ray Outbursts around Periastron of Circinus X-1 Observed with MAXI

Author

Motoki Nakajima, Atsuo T. Okazaki, Kazumi Asai, Tatehiro Mihara, Mutsumi Sugizaki, Masaru Matsuoka, Hitoshi Negoro, and Satoshi Nakahira

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, stars: early-type, Blow out, Instability, Ram pressure, Luminosity, X-rays: binaries, Accretion disc, Space and Planetary Science, Astrophysics::Solar and Stellar Astrophysics, Circinus, Astrophysics::Earth and Planetary Astrophysics, X-rays: individual (Circinus X-1), Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::Galaxy Astrophysics
Abstract

MAXI/GSC observed 21 outbursts from Circinus X-1 between 2009 August and 2013 December. Although 14 outbursts showed ordinary gradual decays, in 7 outbursts we found sudden luminosity decrease in a time scale of a few hours around the periastron, and then the outbursts terminated. These sudden decreases started at the estimated luminosity of a few times $10^{37}$ erg s$^{-1}$ and reached to $\lesssim3\times10^{36}$ erg s$^{-1}$. We propose three interpretations for the sudden luminosity decrease: (1) the end of the outburst during the dip, (2) the propeller effect, and (3) the stripping effect by the stellar wind of the companion star. It is difficult to explain the phenomenon with any of these interpretations alone. The interpretation of (1) is possible for only two outbursts assuming rapid decay. The propeller effect (2) is expected to occur at a constant luminosity, which is incompatible with the observed facts. In wind stripping effect (3), the ram pressure of a typical stellar wind is not sufficient to blow out most of the accretion disk. In this paper, we discuss a possibility of a modified effect of (3) assuming other additional conditions such as wind clumping and disk instability., Comment: 13 pages, 7 figures

Published
2014

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