2015年6月
Suzaku observation of X-ray variability in soft state LMCX-1
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
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- 巻
- 67
- 号
- 3
- 開始ページ
- 46
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1093/pasj/psv017
- 出版者・発行元
- OXFORD UNIV PRESS
This paper reports the results of Suzaku observation of the spectral variation of the black hole binary LMCX-1 in the soft state. The observation was carried out in 2009 from July 21 to 24. the obtained net count rate was similar to 30 counts s(-1) in the 0.5-50 keV band with similar to 10% peak-to-peak flux variation. The time-averaged X-ray spectrum cannot be described by a multi-color disk and single Compton component with its reflection, but requires additional Comptonized emissions. This double Compton component model allows a slightly larger inner radius of the multi-color disk, implying a lower spin parameter. Significant spectral evolution was observed above 8 keV along with a flux decrease on a timescale of similar to 10(4)-10(5) s. By spectral fitting, we show that this behavior is well explained by changes in the hard Comptonized emission component in contrast to the maintained disk and soft Comptonized emission.
- リンク情報
- ID情報
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- DOI : 10.1093/pasj/psv017
- ISSN : 0004-6264
- eISSN : 2053-051X
- Web of Science ID : WOS:000356182500017