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arXiv 2108.11971astro-ph.HEastro-ph.GA
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康普顿薄活动星系核是全局康普顿薄的吗?

Are Compton-thin AGNs Globally Compton Thin?

P. Tzanavaris, T. Yaqoob, S. LaMassa, A. Ptak, M. Yukita

摘要:

我们选择了八个附近的活动星系核,根据以前的工作,似乎是康普顿薄的视线。我们与MYTORUS模型的宽带X射线光谱从20个单独的观测与$Suzaku$,会计自洽的Fe K $α$线发射,以及直接和散射连续从有限的柱密度和太阳Fe丰度的物质。我们的模型配置使我们能够测量全球范围内,视线外,等效氢柱密度分别从视线。对于20个观测结果中的5个(在3个活动星系核中),我们发现全球柱密度实际上是$\gtrsim 1.5 \times 10^{24}$ cm $^{-2}$,这与远距离散射物质的康普顿厚度一致。对于第四个活动星系核,五分之二的观测结果也与康普顿厚度一致,尽管误差很大。据报道,其中一些活动星系核具有相对论性增宽的Fe K $α$发射。根据我们的建模,除了两次$Suzaku$观测之外,Fe K $α$发射线均未解析,并且数据可以与仅包括窄Fe K $α$发射线的模型很好地拟合。

英文摘要:

We select eight nearby AGNs which, based on previous work, appear to be Compton-thin in the line of sight. We model with MYTORUS their broadband X-ray spectra from 20 individual observations with $Suzaku$, accounting self-consistently for Fe K$α$ line emission, as well as direct and scattered continuum from matter with finite column density and solar Fe abundance. Our model configuration allows us to measure the global, out of the line of sight, equivalent hydrogen column density separately from that in the line of sight. For 5 out of 20 observations (in 3 AGNs) we find that the global column density is in fact $\gtrsim 1.5 \times 10^{24}$cm$^{-2}$, consistent with the distant scattering matter being Compton-thick. For a fourth AGN, 2 out of 5 observations are also consistent with being Compton-thick, although with large errors. Some of these AGNs have been reported to host relativistically broadened Fe K$α$ emission. Based on our modeling, the Fe K$α$ emission line is not resolved in all but two $Suzaku$ observations, and the data can be fitted well with models that only include a narrow Fe K$α$ emission line.

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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