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arXiv 0708.0751astro-ph
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关于Seyfert 1星系Markarian 335的相对论铁线和软过剩

On the relativistic iron line and soft excess in the Seyfert 1 galaxy Markarian 335

Paul M. O'Neill, Kirpal Nandra, Massimo Cappi, Anna Lia Longinotti, Stuart A. Sim

摘要:

我们报告了对Seyfert 1星系Markarian 335的133 ksXMM-牛顿观测。0.4-12千电子伏的频谱包含一个潜在的幂律连续,软过剩低于2千电子伏,和双峰铁发射功能在6-7千电子伏的范围。我们调查的可能性,双峰发射可能代表的吸积盘的特征签名。详细的研究表明,一个适度广泛的,吸积盘线是最有可能存在的,但峰值可能是由于更远的材料较窄的组件。在6.4和7千电子伏的峰值,可以确定,分别与分子环面在活动星系核统一计划,非常高度电离,光学薄气体填充环面。长(~100 ks)和短(~1 ks)时间尺度上的X射线变异谱不赞成最近的建议,即软过剩是一个可变的,适度电离吸收的神器。

英文摘要:

We report on a 133 ks XMM-Newton observation of the Seyfert 1 galaxy Markarian 335. The 0.4-12 keV spectrum contains an underlying power law continuum, a soft excess below 2 keV, and a double-peaked iron emission feature in the 6-7 keV range. We investigate the possibility that the double-peaked emission might represent the characteristic signature of the accretion disc. Detailed investigations show that a moderately broad, accretion disc line is most likely present, but that the peaks may be owing to narrower components from more distant material. The peaks at 6.4 and 7 keV can be identified, respectively, with the molecular torus in active galactic nucleus unification schemes, and very highly ionized, optically thin gas filling the torus. The X-ray variability spectra on both long (~100 ks) and short (~1 ks) timescales disfavour the recent suggestion that the soft excess is an artifact of variable, moderately ionized absorption.

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