论文标题
Fairall 9的X射线频谱中的反射特征及其对一般相对性测试的影响
Reflection features in the X-ray spectrum of Fairall 9 and implications for tests of general relativity
论文作者
论文摘要
X射线反射光谱可能是探测天体物理黑洞周围的时空几何形状并测试强场状态中的一般相对性的强大工具。但是，只有当我们采用正确的天体物理模型并且可以限制系统的不确定性时，只有在我们采用正确的天体物理模型时才进行一般相对论的精确测试。因此，选择最适合这些测试的来源和观察结果至关重要。在这项工作中，我们分析了Fairall 9中对XMM-Newton和Nustar的同时观察。该源具有许多特性，使其成为使用X射线反射光谱谱图测试一般相对论的有前途的候选者。然而，我们发现，使用可用的数据，对Fairall 9的频谱没有独特的解释，该频谱目前可以使用此源来进行一般相对性的强大测试。未来的X射线任务可以解决此问题，该任务在铁线附近具有较高的能量分辨率。
X-ray reflection spectroscopy is potentially a powerful tool to probe the spacetime geometry around astrophysical black holes and test general relativity in the strong field regime. However, precision tests of general relativity are only possible if we employ the correct astrophysical model and we can limit the systematic uncertainties. It is thus crucial to select the sources and the observations most suitable for these tests. In this work, we analyze simultaneous observations of XMM-Newton and NuSTAR of the supermassive black hole in Fairall 9. This source has a number of properties that make it a promising candidate for tests of general relativity using X-ray reflection spectroscopy. Nevertheless, we find that with the available data there is not a unique interpretation of the spectrum of Fairall 9, which prevents, for the moment, to use this source for robust tests of general relativity. This issue may be solved by future X-ray missions with a higher energy resolution near the iron line.
