arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1503.05808astro-ph.HE
收藏

软态LMC X-1的X射线光变观测

Suzaku Observation of X-ray Variability in Soft State LMC X-1

Shu Koyama, Shin'ya Yamada, Aya Kubota, Makoto S. Tashiro, Yukikatsu Terada, Kazuo Makishima

摘要:

本文报道了朱雀星对黑洞双星LMCX-1在软态下光谱变化的观测结果。该观察于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$\sim$ 30计数/$^{-1}$,具有$\sim$ 10%的峰-峰通量变化。时间平均X射线谱不能用多色盘和单康普顿分量及其反射来描述,而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。在高于8 keV时观察到显著的光谱演化,同时在$\sim$ 10 $^4$ -10 $^5$ s的时间尺度上观察到通量降低。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。

英文摘要:

This paper reports the results of Suzaku observation of the spectral variation of the black hole binary LMCX-1 in the soft state. The observationwas carried out in 2009 from July 21 to 24. the obtained net count rate was $\sim$30 counts s$^{-1}$ in the 0.5--50 keV band with $\sim$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 $\sim$10$^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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑