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.

引用

页数：14