arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.06719astro-ph.HEgr-qc
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模拟X射线反射光谱测量的不确定性II:来自俯冲区的辐射的影响

Modeling uncertainties in X-ray reflection spectroscopy measurements II: Impact of the radiation from the plunging region

Alejandro Cardenas-Avendano, Menglei Zhou, Cosimo Bambi

摘要:

X射线反射光谱是探测黑洞周围强引力区的有力工具,但现有的相对论反射模型有许多简化,导致在测量源的性质时存在系统的不确定性(不能完全控制)。在第一篇论文中,我们考虑了光学薄倾伏区的情况,并研究了由圆盘的另一侧或环绕黑洞一次或多次所产生的辐射的影响。在本文中,我们讨论的情况下,光学厚的暴跌区域,我们研究的暴跌气体的反射光谱的影响。我们发现,这种辐射的贡献是更重要的低值的黑洞自旋参数和大的值的视角,并显着降低自旋参数的增加和倾角减小。虽然一些参数的估计可能会受到影响的反射光谱的暴跌气体,如果这是不包括在理论模型中,我们发现,这种辐射并没有明显限制我们的能力测试的克尔黑洞假设。

英文摘要:

X-ray reflection spectroscopy is a powerful tool to probe the strong gravity region around black holes, but the available relativistic reflection models have a number of simplifications that lead to systematic uncertainties (not fully under control) in the measurement of the properties of a source. In Paper I, we considered the case of an optically thin plunging region and we studied the impact of the radiation produced by the other side of the disk or circling the black hole one or more times. In the present paper, we discuss the case of an optically thick plunging region and we study the impact of the reflection spectrum of the plunging gas. We show that the contribution of such radiation is more important for low values of the black hole spin parameter and large values of the viewing angle, and it decreases significantly as the spin parameter increases and the inclination angle decreases. While the estimate of some parameters may be affected by the reflection spectrum of the plunging gas if this is not included in the theoretical model, we find that such radiation does not appreciably limit our capability of testing the Kerr black hole hypothesis.

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