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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >The nature of stable soft X-ray emissions in several types of active galactic nuclei observed by Suzaku
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The nature of stable soft X-ray emissions in several types of active galactic nuclei observed by Suzaku

机译：朱雀观测到几种类型的活跃银河核中稳定的软X射线发射的性质

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摘要

To constrain the origin of the soft X-ray excess phenomenon seen in many active galactic nuclei, the intensity-correlated spectral analysis, developed by Noda et al. (2011, PASJ, 63, S925) for Markarian 509, was applied to wideband (0.5-45 keV) Suzaku data of five representative objects with a relatively weak reflection signature. They are the typical bare-nucleus type 1 Seyfert Fairall 9, the bright and typical type 1.5 Seyfert MCG-2-58-22, 3C 382, which is one of the X-ray brightest broad line radio galaxies, the typical Seyfert-like radio loud quasar 4C+74.26, and the X-ray brightest radio quiet quasar MR 2251-178. In all of them, soft X-ray intensities in energies below 3 keV were tightly correlated with that in 3-10 keV, but with significant positive offsets. These offsets, when calculated in finer energy bands, define a stable soft component in 0.5-3 keV. In each object, this component successfully explained the soft excess above a power-law fit. These components were interpreted in several alternative ways, including a thermal Comptonization component that is independent of the dominant power-law emission. This interpretation, considered physically most reasonable, is discussed from a viewpoint of Multi-Zone Comptonization, which was proposed for the black hole binary Cygnus X-1 (Makishima et al. 2008, PASJ, 60, 585).
机译：为了限制在许多活跃的银河核中看到的软X射线过量现象的起源，由Noda等人开发的强度相关光谱分析。 （2011，PASJ，63，S925）将Markarian 509应用于反射特征相对较弱的五个代表性对象的宽带（0.5-45 keV）朱雀库数据。它们是典型的裸核1型塞弗尔Fairall 9型，明亮而典型的1.5型塞弗尔MCG-2-58-22、3C 382，它是X射线最亮的宽谱线射电星系之一，典型的类似于塞弗特星系无线电大声类星体4C + 74.26，以及X射线最亮的无线电安静类星体MR 2251-178。在所有这些中，能量低于3 keV的软X射线强度与3-10 keV中的软X射线强度紧密相关，但具有明显的正偏移。在较细的能带中计算时，这些偏移量定义了0.5-3 keV的稳定软成分。在每个对象中，该组件都成功地解释了超出幂律拟合的部分。这些组件以几种替代方式进行了解释，包括独立于主要幂律发射的热Comptonization组件。从物理上最合理的角度出发，从针对黑洞二进制Cygnus X-1提出的多区域Comptonization的角度讨论了这种解释（Makishima等，2008，PASJ，60，585）。

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