X-ray reflection spectroscopy is a powerful tool for probing the strong gravity region of black holes and can be used for testing general relativity in the strong field regime. Simplifications of the available relativistic reflection models limit the capability of performing accurate measurements of the properties of black holes. In this paper, we present an extension of the model RELXILL_NK in which the accretion disk has a finite thickness rather than being infinitesimally thin. We employ the accretion disk geometry proposed by Taylor & Reynolds (2018) and we construct relativistic reflection models for different values of the mass accretion rate of the black hole. We apply the new model to high quality Suzaku data of the X-ray binary GRS 1915+105 to explore the impact of the thickness of the disk on tests of the Kerr metric.

中文翻译：

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使用 X 射线反射光谱和具有有限厚度的薄盘模型测试克尔黑洞假设

X射线反射光谱是探测黑洞强引力区的有力工具，可用于在强场区检验广义相对论。可用相对论反射模型的简化限制了对黑洞特性进行准确测量的能力。在本文中，我们提出了模型 RELXILL_NK 的扩展，其中吸积盘具有有限的厚度而不是无限薄。我们采用了 Taylor & Reynolds (2018) 提出的吸积盘几何形状，并针对黑洞质量吸积率的不同值构建了相对论反射模型。我们将新模型应用于 X 射线二进制 GRS 1915+105 的高质量朱雀数据，以探索圆盘厚度对克尔度量测试的影响。