Exploring the X‐ray spectral variability of MCG–6‐30‐15 with XMM–Newton
Exploring the X‐ray spectral variability of MCG–6‐30‐15 with XMM–Newton
复制标题
使用 XMM-Newton 探索 MCG-6-30-15 的 X 射线光谱变异性
DOI：
10.1111/j.1365-2966.2007.11436.x
复制
发表时间：
2007
影响因子：
4.8
通讯作者：
R. Ross
中科院分区：
文献类型：
--
作者：
Josefin Larsson;A. Fabian;G. Miniutti;R. Ross
基于2000年和2001年的两次长XMM - Newton观测，我们对Seyfert I星系MCG‐6-30-15的光谱变异性进行了研究。2001年数据的X射线光谱和可变性特性先前已经用一个双组分模型进行了很好的描述，该模型由一个可变幂律和一个变化较少的反射组分组成，其中包含一条来自快速旋转的克尔黑洞周围吸积盘的广义相对论性铁线。反射分量的缺乏可变性被解释为非常接近中心黑洞的强引力光弯曲的影响。利用改进的反射模型，我们将双分量模型拟合到两个观测的时间分辨光谱上。假设幂律的光子指数是恒定的，我们再次确认了旧的结果，并表明这与分析的时间尺度无关。
We present a study of the spectral variability of the Seyfert I galaxy MCG‐6-30-15 based on the two long XMM‐Newton observations from 2000 and 2001. The X‐ray spectrum and variability properties of the 2001 data have previously been well described with a two-component model consisting of a variable power-law and a much less variable reflection component, containing a broad relativistic iron line from the accretion disc around a rapidly rotating Kerr black hole. The lack of variability of the reflection component has been interpreted as an effect of strong gravitational light bending very close to the central black hole. Using an improved reflection model, we fit the two-component model to time-resolved spectra of both observations. Assuming that the photon index of the power law is constant, we reconfirm the old result and show that this does not depend on the time-scale of the analysis.