Suzaku Observation of X-ray Variability in Soft State LMC X-1
Suzaku Observation of X-ray Variability in Soft State LMC X-1
复制标题
软态 LMC X-1 中 X 射线变化的朱雀观察
DOI：
10.1093/pasj/psv017
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Koyama ; S. Yamada; A. Kubota; M. S. Tashiro; Y. Terada; K. Makishima
中科院分区：
文献类型：
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作者：
Hori;T.; Ueda;Y.; Done;C.; Shidatsu;M.; Kawamuro;T.; Kubota;A.; Nakahira;S.;Koyama ; S. Yamada; A. Kubota; M. S. Tashiro; Y. Terada; K. Makishima
本文报道了朱雀星对黑洞双星LMC X-1在软态下光谱变化的观测结果。观察于2009年7月21日至24日进行。在0.5-50 keV频带中获得的净计数率为1030计数s-1，峰-峰通量变化为10%。时间平均的X射线谱不能用多色盘和单个康普顿分量及其反射来描述，而是需要附加的康普顿化发射。这种双康普顿分量模型允许多色盘的内半径稍大，意味着较低的自旋参数。在8 keV以上沿着观察到显著的光谱演化，在104- 105 s的时间尺度上通量减小。通过光谱拟合，我们表明，这种行为很好地解释了硬康普顿发射分量的变化，而保持磁盘和软康普顿发射。
This paper reports the results of Suzaku observation of the spectral variation of the black hole binary LMC X-1 in the soft state. The observation was carried out in 2009 from July 21 to 24. the obtained net count rate was ∼ 30 counts s−1in the 0.5–50 keV band with ∼ 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 ∼ 104–105s. 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.