https://doi.org/10.1140/epjc/s10052-024-12446-w
Regular Article - Theoretical Physics
Luminosity of accretion disks around rotating regular black holes
1
National Nanotechnology Laboratory of Open Type, 050040, Almaty, Kazakhstan
2
Al-Farabi Kazakh National University, Al-Farabi av. 71, 050040, Almaty, Kazakhstan
3
Institute of Nuclear Physics, Ibragimova, 1, 050032, Almaty, Kazakhstan
4
International Engineering Technological University, 93G/5 Al-Farabi avenue, 050060, Almaty, Kazakhstan
5
Università di Camerino, Via Madonna delle Carceri 9, 62032, Camerino, Italy
6
SUNY Polytechnic Institute, 13502, Utica, NY, USA
7
Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, 06123, Perugia, Italy
8
INAF-Osservatorio Astronomico di Brera, Milan, Italy
Received:
20
November
2023
Accepted:
11
January
2024
Published online:
4
March
2024
We study thin accretion disks in the gravitational field of a class of rotating regular black holes. Our objective is to determine the key parameters governing these accretion disks: the radius of the innermost stable circular orbit 
and the efficiency 
of the accretion disk in converting matter into radiation. We employ a simplified model to describe the disk’s radiative flux, and differential and spectral luminosity. Subsequently, we compare our findings with the expectations from accretion disks around Kerr black holes. Notably, our calculations reveal that both the luminosity of the accretion disk and its efficiency are greater when considering the geometry of rotating regular black holes, particularly for fixed and small values of the spin parameter (j), in contrast to the predictions obtained using the Kerr metric for a black hole of the same mass. These results offer intriguing insights into the behavior of astrophysical black holes.
© The Author(s) 2024
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3.
