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arXiv 0911.3243astro-ph.HE
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对GX339 -4低/硬态XMM-牛顿数据中铁谱线的再分析

A re--analysis of the iron line in the XMM-Newton data from the low/hard state in GX339--4

Chris Done, Maria Diaz Trigo

摘要:

从黑洞双星GX 339 -4的低/硬态中,在XMM-牛顿MOS数据中检测到一条极宽的铁线,这是唯一一条与这种状态的截断圆盘解释相冲突的证据。然而,它也与低/硬态的所有其他替代几何形状的观测数据的某些方面相冲突,包括喷流模型,使其非常难以理解。我们重新分析了这些数据,并表明它们受到堆积的强烈影响,即使有广泛的质心去除,因为源比推荐的最大计数率亮约200倍。相反,我们提取的同时PN定时模式的数据,不应该受到堆积。这些显示出比MOS数据中的线明显更窄的线。因此,这些数据很容易与截短的圆盘相一致,并且确实有力地支持了这种解释。

英文摘要:

The detection of an extremely broad iron line in XMM-Newton MOS data from the low/hard state of the black hole binary GX339-4 is the only piece of evidence which unambiguously conflicts with the otherwise extremely successful truncated disc interpretation of this state. However, it also conflicts with some aspect of observational data for all other alternative geometries of the low/hard state, including jet models, making it very difficult to understand. We re-analyse these data and show that they are strongly affected by pileup even with extensive centroid removal as the source is ~200x brighter than the recommended maximum countrate. Instead, we extract the simultaneous PN timing mode data which should not be affected by pileup. These show a line which is significantly narrower than in the MOS data. Thus these data are easily consistent with a truncated disc, and indeed, strongly support such an interpretation.

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。

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