论文标题
在Kerr黑洞周围有限厚度的薄积聚磁盘的热光谱
Thermal spectra of thin accretion disks of finite thickness around Kerr black holes
论文作者
论文摘要
所谓的连续拟合方法的几何薄和光学厚的积聚磁盘的热光谱分析是测量黑洞旋转的领先技术之一。当前模型通常将磁盘近似为无限薄，而实际上，磁盘厚度是有限的，并且随着黑洞质量积聚率的增加而增加。在这里，我们提出了一个XSPEC模型，以计算Kerr黑洞周围有限厚度的薄积聚盘的多温度黑体光谱。我们通过对黑洞二进制GRS 1915+105的RXTE观察测试我们的新模型。我们发现，使用新模型推断出的自旋值略高于使用具有无限薄磁盘的模型获得的旋转值，但差异很小，目前相对于在最终旋转测量中的其他不确定性来源而言，效果是依次的。
The analysis of the thermal spectrum of geometrically thin and optically thick accretion disks of black holes, the so-called continuum-fitting method, is one of the leading techniques for measuring black hole spins. Current models normally approximate the disk as infinitesimally thin, while in reality the disk thickness is finite and increases as the black hole mass accretion rate increases. Here we present an XSPEC model to calculate the multi-temperature blackbody spectrum of a thin accretion disk of finite thickness around a Kerr black hole. We test our new model with an RXTE observation of the black hole binary GRS 1915+105. We find that the spin value inferred with the new model is slightly higher than the spin value obtained with a model with an infinitesimally thin disk, but the difference is small and the effect is currently subdominant with respect to other sources of uncertainties in the final spin measurement.
