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arXiv 1209.0468astro-ph.HEastro-ph.CO
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明亮Seyfert星系Fairall 9的黑洞自旋和软X射线过剩

The Black Hole Spin and Soft X-ray Excess of the Luminous Seyfert Galaxy Fairall 9

Anne M. Lohfink, Christopher S. Reynolds, Jon M. Miller, Laura W. Brenneman, Richard F. Mushotzky, Michael A. Nowak, Andrew C. Fabian

摘要:

我们提出了一个分析的所有XMM牛顿和朱雀X射线光谱附近的发光塞弗特星系费尔9。重复以前的分析,我们发现了强有力的证据,广泛的铁线与X射线反射从最里面的吸积盘。通过拟合的光谱模型,包括相对论电离的反射组件,我们检查的约束内吸积盘和黑洞自旋的倾斜,以及由光电离发射线系统的存在下引入的并发症。采用多历元拟合,我们试图获得稳健的和一致的措施的吸积盘参数。我们还清楚地看到Fairall 9中的软X射线过量。在某些时期,软过剩可以用产生铁线的相同圆盘反射分量来描述。然而,存在需要额外的软组件的时期。这可以归因于一个额外的高度电离,强烈模糊的磁盘反射组件,或一个新的X射线连续分量。

英文摘要:

We present an analysis of all XMM-Newton and Suzaku X-ray spectra of the nearby luminous Seyfert galaxy Fairall 9. Confirming previous analyses, we find robust evidence for a broad iron line associated with X-ray reflection from the innermost accretion disk. By fitting a spectral model that includes a relativistically ionized reflection component, we examine the constraints on the inclination of the inner accretion disk and the black hole spin, and the complications introduced by the presence of a photoionized emission line system. Employing multi-epoch fitting, we attempt to obtain robust and concordant measures of the accretion disk parameters. We also clearly see a soft X-ray excess in Fairall 9. During certain epochs, the soft excess can be described with same disk reflection component that produces the iron line. However, there are epochs where an additional soft component is required. This can be attributed to either an additional highly-ionized, strongly blurred disk reflection component, or a new X-ray continuum component.

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