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arXiv 0903.0978astro-ph.GA
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AGN吸积盘的X射线辐射:超大质量黑洞的特征

X-ray Emission From Accretion Disks of AGN: Signatures of Supermassive Black Holes

Predrag Jovanović, Luka Č. Popović

摘要:

在本章中,我们讨论了活动星系核(AGN)中心的超大质量黑洞周围相对论吸积盘的X射线辐射。我们的重点是X射线辐射,特别是在Fe K $α$线,它起源于一个吸积盘的最里面的部分。此外,本文还讨论了在活动星系核的X射线谱中观测到的一些能干扰Fe K $α$轮廓并导致其快速和不规则变化的效应。我们将注意三个这样的影响:扰动的磁盘发射率,吸收温暖的吸收剂和引力微透镜。讨论了非旋转(Schwarzschild度规)和旋转(Kerr度规)超大质量黑洞吸积盘的X射线辐射。活动星系核的X射线辐射很可能产生于其中心超大质量黑洞附近的致密区域,它可以提供有关这些区域等离子体状况和时空几何的一些重要信息。本章的目的主要是提出一个简短的概述,在这一领域的一些重要的和最近的调查。

英文摘要:

In this chapter we discuss the X-ray radiation from relativistic accretion disks around supermassive black holes, supposed to exist in the centers of Active Galactic Nuclei (AGN). Our focus is on the X-ray radiation, especially in the Fe K$α$ line which originates in the innermost parts of an accretion disk. Moreover, here we discuss some effects which can disturb the Fe K$α$ profile and cause its rapid and irregular variability, observed in the X-ray spectra of some AGN. We will pay attention to three such effects: perturbations in the disk emissivity, absorbtion by warm absorbers and gravitational microlensing. The X-ray emission from accretion disks around non-rotating (Schwarzschild metric), as well as rotating (Kerr metric) supermassive black holes, is discussed. The X-ray radiation of AGN is probably produced in a compact region near their central supermassive black holes, and can provide us some essential information about the plasma conditions and the space-time geometry in these regions. The goal of this chapter is mainly to present a short overview of some important and recent investigations in this field.

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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