Мақола

About the Kerr Nature of the Stellar-mass Black Hole in GRS 1915+105

Yuexin ZhangCenter for Field Theory and Particle Physics and Department of Physics, Fudan University, 200438 Shanghai, People’s Republic of China; [email protected]Askar B. AbdikamalovCenter for Field Theory and Particle Physics and Department of Physics, Fudan University, 200438 Shanghai, People’s Republic of China; [email protected]Dimitry AyzenbergCenter for Field Theory and Particle Physics and Department of Physics, Fudan University, 200438 Shanghai, People’s Republic of China; [email protected]Cosimo BambiCenter for Field Theory and Particle Physics and Department of Physics, Fudan University, 200438 Shanghai, People’s Republic of China; [email protected]Thomas DauserRemeis Observatory & ECAP, Universität Erlangen-Nürnberg, D-96049 Bamberg, GermanyJavier A. GarcíaCahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USASourabh NampalliwarTheoretical Astrophysics, Eberhard-Karls Universität Tübingen, D-72076 Tübingen, Germany

2019en

ABI

Аннотация

Abstract We employ the accretion disk reflection model relxill _ nk to test the spacetime geometry around the stellar-mass black hole in GRS 1915+105. We adopt the Johannsen metric with the deformation parameters α 13 and α 22 , for which the Kerr solution is recovered when α 13 = α 22 = 0. We analyze a NuSTAR observation of 2012, obtaining vanishing and non-vanishing values of the deformation parameters depending on the astrophysical model adopted. Similar difficulties were not found in our previous tests with other sources. The results of this work can shed light on the choice of sources suitable for testing the Kerr metric using X-ray reflection spectroscopy and on the parts of our reflection models that more urgently require improvement.

Ҳали таржима қилинмаган

Идентификаторлар

DOI: 10.3847/1538-4357/ab0e79

Иқтибослар ва манбалар

5 та иқтибос0 та фойдаланилган манба

Кўрсаткичлар — AkademScholar