2015年
Repeated short-term spectral softening in the low/hard state of the Galactic black hole candidate Swift J1753.5-0127
Publications of the Astronomical Society of Japan
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- 巻
- 67
- 号
- 1
- 開始ページ
- 11
- 終了ページ
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1093/pasj/psu140
© The Author 2014. We report MAXI and Swift observations of short-term spectral softenings of the Galactic black hole X-ray binary Swift J1753.5-0127 in the low/hard state. These softening events are characterized by a simultaneous increase of soft X-rays (2-4 keV) and a decrease of hard X-rays (15-50 keV) lasting for a few tens of days. The X-ray energy spectra during the softening periods can be reproduced with a model consisting of a multi-color disk blackbody and its Comptonized component. The fraction of the Comptonized component decreased from 0.30 to 0.15 when the spectrum became softer; meanwhile the inner disk temperature (Tin) increased from 0.2 to 0.45 keV. These results imply that the softening events are triggered by a short-term increase of the mass accretion rate. During the observed spectral softening events, the disk flux (Fdisk) and Tin did not obey the Fdisk ∝ (Tin )4 relation, suggesting that the inner disk radius does not reach the innermost stable circular orbit.
- リンク情報
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- DOI
- https://doi.org/10.1093/pasj/psu140
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84942163515&origin=inward 本文へのリンクあり
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84942163515&origin=inward
- URL
- https://ui.adsabs.harvard.edu/#abs/2015PASJ...67...11Y
- ID情報
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- DOI : 10.1093/pasj/psu140
- ISSN : 0004-6264
- eISSN : 2053-051X
- SCOPUS ID : 84942163515