Testing the Kerr hypothesis using x-ray reflection spectroscopy with NuSTAR data of Cygnus X-1 in the soft state

被引：22
|
作者：
Liu, Honghui [1 ,2 ]
Abdikamalov, Askar B. [1 ,2 ]
Ayzenberg, Dimity [1 ,2 ]
Bambi, Cosimo [1 ,2 ]
Dauser, Thomas [3 ,4 ]
Garcia, Javier A. [3 ,4 ,5 ]
Nampalliwar, Sourabh [6 ]
机构：
[1] Fudan Univ, Ctr Field Theory & Particle Phys, Shanghai 200438, Peoples R China
[2] Fudan Univ, Dept Phys, Shanghai 200438, Peoples R China
[3] Univ Erlangen Nurnberg, Remeis Observ, D-96049 Bamberg, Germany
[4] Univ Erlangen Nurnberg, ECAP, D-96049 Bamberg, Germany
[5] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 USA
[6] Eberhard Karls Univ Tubingen, Theoret Astrophys, D-72076 Tubingen, Germany
来源：
PHYSICAL REVIEW D | 2019年 / 99卷 / 12期
关键词：
BLACK-HOLE SPIN; ABSORPTION; SPECTRA; DISC;
D O I：
10.1103/PhysRevD.99.123007
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We continue exploring the constraining capabilities of x-ray reflection spectroscopy to test the Kerr-nature of astrophysical black holes, and we present the results of our analysis of two NuSTAR observations of Cygnus X-1 in the soft state. We find that the final measurement can strongly depend on the assumption of the intensity profile. We conclude that Cygnus X-1 is not suitable for tests of general relativity using x-ray reflection spectroscopy, and we discuss the desired properties of a source to be a good candidate for our studies.
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页数：14
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