Wide-band X-ray Studies of Inner Disc Structure in Galactic Black Hole Binaries
Wide-band X-ray Studies of Inner Disc Structure in Galactic Black Hole Binaries
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DOI：
10.22323/1.233.0162
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发表时间：
2015-08
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影响因子：
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通讯作者：
M. Shidatsu;Y. Ueda;T. Hori;C. Done;S. Nakahira
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作者：
M. Shidatsu;Y. Ueda;T. Hori;C. Done;S. Nakahira
我们介绍了我们最近对银河系黑洞瞬变MAXI J1305−704、H 1743−322和4U 1630−472的朱雀和斯威夫特机会时间观测结果。在低/硬态（前两个源）和甚高态（4U 1630 - 472）中获得的宽带高质量数据使我们能够在各种X射线光度下约束吸积流的结构。我们发现，所有的光谱，包括4U 1630-472的数据，采取4天后的重子喷流的检测[2]，包含强康普顿化的成分，并建议盘截断。在H 1743−322的数据中，探测到一个低频QPO，其频率与X射线光度和光子指数相关。这可能是由光盘截断半径的演变。考虑到这些结果，我们讨论了在较宽的质量吸积率范围内黑洞双星的内部盘结构。
We present our recent results from Suzaku and Swift Time-Of-Opportunity observations of the Galactic black hole transients MAXI J1305−704, H 1743−322, and 4U 1630−472. The wideband high-quality data obtained in the low/hard state (the former two sources) and in the very high state (4U 1630−472) enable us to constrain the structure of the accretion flow in various Xray luminosities. We find that all the spectra, including the 4U 1630-472 data, taken 4 days after the detection of the baryonic jet [2], contain strong Comptonised components and suggest disc truncation. In the H 1743−322 data, a low-frequency QPO is detected, whose frequency is found to correlate the X-ray luminosity and photon index. This may be explained by the evolution of the disc truncation radius. Considering these results, we discuss the inner disc structure of black hole binaries over a wide range of mass accretion rates.