论文标题
使用X射线反射光谱测试开普勒磁盘假说
Testing the Keplerian disk hypothesis using X-ray reflection spectroscopy
论文作者
论文摘要
Novikov-Thorne模型是描述黑洞周围几何薄且光学厚的积聚磁盘的标准框架，可广泛用于研究积聚黑洞的电磁光谱。该模型的假设之一是气体的颗粒在赤道平面上的几乎对地点圆形轨道上移动。在这项工作中，我们建议使用X射线反射光谱测试吸积盘中颗粒的开普勒速度。我们提出了Relxill的修改版本，其中我们引入了一个现象学参数$α$，以量化可能与Keplerian运动的偏差。我们使用模型来适应黑洞二进制GRS 1915+105的Suzaku观察。我们发现，$α$的估计与磁盘（$ i $）的倾斜角度有关，并且我们可以在存在$ i $的强大且独立的尺寸的情况下测试开普勒磁盘假说。
The Novikov-Thorne model is the standard framework for the description of geometrically thin and optically thick accretion disks around black holes and is widely used to study the electromagnetic spectra of accreting black holes. One of the assumptions of the model is that the particles of the gas move on nearly-geodesic circular orbits on the equatorial plane. In this work, we propose to test the Keplerian velocity of the particles in the accretion disk using X-ray reflection spectroscopy. We present a modified version of RELXILL in which we introduce a phenomenological parameter, $α$, to quantify possible deviations from Keplerian motion. We use our model to fit a Suzaku observation of the black hole binary GRS 1915+105. We find that the estimate of $α$ is correlated to that of the inclination angle of the disk, $i$, and that we could test the Keplerian disk hypothesis in the presence of a robust and independent measurement of $i$.
