Radiative characteristics of accretion disks around rotating regular black holes

Ye.  Kurmanov; T.  Konysbayev; G. Suliyeva; G. Ikhsan; N.  Saiyp; G. Rabigulova; A. Urazalina

doi:10.26577/ijmph.2024v15i1a7

Authors

Ye. Kurmanov Al-Farabi Kazakh National University, Almaty, Kazakhstan https://orcid.org/0000-0003-3695-0166
T. Konysbayev Al-Farabi Kazakh National University, Almaty, Kazakhstan https://orcid.org/0000-0001-9476-3700
G. Suliyeva Al-Farabi Kazakh National University, Almaty, Kazakhstan https://orcid.org/0000-0001-5072-7898
G. Ikhsan Al-Farabi Kazakh National University, Almaty, Kazakhstan https://orcid.org/0000-0003-0556-166X
N. Saiyp Al-Farabi Kazakh National University, Almaty, Kazakhstan https://orcid.org/0009-0001-9128-0671
G. Rabigulova Al-Farabi Kazakh National University, Almaty, Kazakhstan https://orcid.org/0009-0003-8998-6282
A. Urazalina Al-Farabi Kazakh National University, Almaty, Kazakhstan https://orcid.org/0000-0002-4633-9558

DOI:

https://doi.org/10.26577/ijmph.2024v15i1a7

272 171

Abstract

Our research focuses on examining the characteristics of thin accretion disks encircling rotating regular black holes. In this study, we investigate the important features of accretion disks surrounding Bardeen's regular black holes, which play a crucial role in addressing the singularity issue. The horizon configuration of rotating Bardeen black holes is analyzed in details, as well as the innermost stable circular orbits related to this spacetime. The primary goal is to derive quantitively the radiative flux, differential and spectral luminosities of the accretion disk. Within the specified gravitational field, particularly, by taking the parameter r_0*>0 and fixing the j=0.2, our findings show that the corresponding accretion disk’s luminosity exceeds that one predicted by the Kerr metric at identical value of spin parameter ( j=0.2). Making the juxtaposition of Bardeen’s black hole parameter with the spin parameter of the Kerr black hole we reveal that the spacetime corresponding to the non-rotating Bardeen black holes, in some certain cases, can imitate the Kerr spacetime.

Keywords: rotating Bardeen spacetime, angular velocity, angular momentum, energy and radiative flux.

Author Biographies

Ye. Kurmanov, Al-Farabi Kazakh National University, Almaty, Kazakhstan

PhD, Acting Associate Professor at Al-Farabi Kazakh National University, email: ergaly_90@mail.ru

T. Konysbayev, Al-Farabi Kazakh National University, Almaty, Kazakhstan

PhD at Al-Farabi Kazakh National University, e-mail: talgar_777@mail.ru

G. Suliyeva, Al-Farabi Kazakh National University, Almaty, Kazakhstan

(Corresponding author) , 2nd year doctoral student at the Department of Theoretical and Nuclear Physics at Al-Farabi Kazakh National University, e-mail: g_suliyeva@mail.ru

G. Ikhsan, Al-Farabi Kazakh National University, Almaty, Kazakhstan

Junior Research Associate at National Nanotechnology Laboratory of Open Type, Almaty, Kazakhstan, email: gulfeyruz.ihsan@mail.ru

N. Saiyp, Al-Farabi Kazakh National University, Almaty, Kazakhstan

1st year master's student at the Department of Solid State Physics and Nonlinear Physics at Al-Farabi Kazakh National University, e-mail: nazymsaiyp1@gmail.com

G. Rabigulova, Al-Farabi Kazakh National University, Almaty, Kazakhstan

1st year master's student at the Department of Solid State Physics and Nonlinear Physics at Al-Farabi Kazakh National University, e-mail: guldanaberikhanovna@gmail.com

A. Urazalina, Al-Farabi Kazakh National University, Almaty, Kazakhstan

PhD, Senior Lecturer at Al-Farabi Kazakh National University, email: y.a.a.707@mail.ru