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arXiv 0905.2973astro-ph.CO
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用Chandra和XMM-Newton数据对82个LINER的X射线视图

An X-ray view of 82 LINERs with Chandra and XMM-Newton data

O. Gonzalez-Martin, J. Masegosa, I. Marquez, M. Guainazzi, E. Jimenez-Bailon

备注：
Accepted for publications in Astronomy and Astrophysics, 49 pages, 12 figures. Catalogs only at: http://www.star.le.ac.uk/~gmo4/O.Gonzalez-Martin-LINERs_xray.pdf
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摘要：

我们给出了从Carrillo等人（1999）的目录中选出的82个邻近LINER的均匀X射线分析结果。所有源都有可用的钱德拉（68个源）和/或XMM-牛顿（55个源）观测。这是具有X射线光谱数据的LINER的最大样本（82个对象中的60个），并且显著改进了我们先前基于Chandra数据对51个LINER的分析（Gonzalez-Martin等人，2006）。它增加了样本大小并添加了XMM-牛顿数据。新模型允许在光谱拟合中包含双吸收体。核X射线形态是从硬带（4.5-8.0 keV）中检测到的核源的紧凑性推断出来的。60%的样本显示出一个紧凑的核源，被归类为活动星系核候选者。光谱分析表明，最佳拟合涉及一个复合模型：吸收的主要连续和（2）软光谱低于2千电子伏所描述的吸收散射体和/或热组件。得到的中值光谱参数及其标准偏差为：G=2.11，<kT>=0.54 keV，&lt;log（NH 1）&gt;=21.32和&lt;log（NH 2）&gt;=21.93。我们补充我们的X射线的结果与我们的分析HST光学图像和文献数据的发射线，射电致密性和恒星星族。加上所有这些多波长的数据，我们得出结论，证据确实存在支持他们的核引擎的80%的样本（66个82对象）活动星系核的性质。

英文摘要：

We present the results of an homogeneous X-ray analysis for 82 nearby LINERs selected from the catalogue of Carrillo et al. (1999). All sources have available Chandra (68 sources) and/or XMM-Newton (55 sources) observations. This is the largest sample of LINERs with X-ray spectral data (60 out of the 82 objects) and significantly improves our previous analysis based on Chandra data for 51 LINERs (Gonzalez-Martin et al. 2006). It increases both the sample size and adds XMM-Newton data. New models permit the inclusion of double absorbers in the spectral fits. Nuclear X-ray morphology is inferred from the compactness of detected nuclear sources in the hard band (4.5-8.0 keV). Sixty per cent of the sample shows a compact nuclear source and are classified as AGN candidates. The spectral analysis indicates that best fits involve a composite model: absorbed primary continuum and (2) soft spectrum below 2 keV described by an absorbed scatterer and/or a thermal component. The resulting median spectra parameters and their standard deviations are: G=2.11, <kT>=0.54 keV, <log(NH1)>=21.32 and <log(NH2)>=21.93. We complement our X-ray results with our analysis of HST optical images and literature data on emission lines, radio compactness and stellar population. Adding all these multiwavelength data, we conclude that evidence do exist supporting the AGN nature of their nuclear engine for 80% of the sample (66 out of 82 objects).

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