论文标题
用连续拟合方法测试Ghasemi-Nodehi-Bambi时空
Testing Ghasemi-Nodehi-Bambi spacetime with continuum-fitting method
论文作者
论文摘要
连续拟合方法是分析几何薄且光学厚的积聚盘周围恒星质量黑洞的热光谱。旨在测试天体物理黑洞KERR性质的参数化在EPJC 76：290，2016中提出了在Ghasemi-Nodehi和Bambi中。公制除质量和自旋参数外还包含11个参数。一个人可以通过将所有参数设置为一个来恢复KERR案例。在本文中，我研究了Ghasemi-Nodehi-Bambi背景中的连续拟合方法。我显示了每个参数对光谱的影响。然后，我使用\ c {hi} 2研究，并表明使用连续拟合方法Ghasemi-Nodehi- bambi时空的所有参数都是退化的。但是，在高自旋值和Ghasemi-Nodehi-bambi黑洞的情况下，参数B9可以受到约束。这种退化意味着Kerr病例的光谱与Ghasemi-Nodehi-Bmabi时空产生的光谱无法区分。这是一个问题，即测量天体物理黑洞的自旋并限制与一般相对性的KERR案例的可能偏差。
The continuum-fitting method is the analysis of the thermal spectrum of the geometrically thin and optically thick accretion disk around stellar-mass black holes. A parametrization aiming to test the Kerr nature of astrophysical black holes was proposed in Ghasemi-Nodehi and Bambi in EPJC 76: 290, 2016. The metric contains 11 parameters in addition to the mass and spin parameters. One can recover the Kerr case by setting all parameters to one. In this paper, I study the continuum-fitting method in Ghasemi-Nodehi-Bambi background. I show the impact of each of the parameters on the spectra. I then employ \c{hi}2 studies and show that using the continuum-fitting method all parameters of Ghasemi-Nodehi- Bambi spacetime are degenerate. However, the parameter b9 can be constrained in the case of a high spin value and the Ghasemi-Nodehi-Bambi black hole as reference. This degeneracy means that the spectra of the Kerr case cannot be distinguished from spectra produced in Ghasemi-Nodehi-Bmabi spacetime. This is a problem as regards measuring the spin of astrophysical black holes and constrain possible deviations from the Kerr case of General Relativity.
