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arXiv 1006.0955astro-ph.HE
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解释AGN中的硬超额

Explaining the Hard Excesses in AGN

D. J. Walton, R. C. Reis, A. C. Fabian

摘要:

一个常见的模型调用来描述活动星系的X射线光谱包括相对论模糊的反射分量,在某些情况下,这可能是主要的贡献者接收通量。其他解释通常基于复杂的吸收,迄今为止,已证明很难确定这两个可行的模型。最近对NGC 1365、1H 0419-577和PDS 456中活动核的SUZAKU观测发现了高能量(~10-50 keV)的强X射线发射,称为“硬超”,并且声称这种发射不能用简单的圆盘反射模型来解释。在这里,我们调查的高能量发射在这些来源,通过构建光盘反射模型,并表明,他们可以成功地再现所观察到的光谱。此外,我们发现NGC 1365和1H 0419-577在这些观测中的行为与以前对圆盘反射解释的工作大致一致。

英文摘要:

A common model invoked to describe the X-ray spectra of active galaxies includes a relativistically blurred reflection component, which in some cases can be the dominant contributor to the received flux. Alternative interpretations are often based around complex absorption, and to date it has proven difficult to determine between these two viable models. Recent works on SUZAKU observations of the active nuclei in NGC 1365, 1H 0419-577 and PDS 456 have found the presence of strong X-ray emission at high (~10-50 keV) energies, referred to as 'hard excesses', and it has been claimed this emission cannot be explained with simple disc reflection models. Here we investigate the high energy emission in these sources by constructing disc reflection models and show that they can successfully reproduce the observed spectra. In addition, we find the behaviour of NGC 1365 and 1H 0419-577 in these observations to be broadly consistent with previous work on disc reflection interpretations.

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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