Accretion disks properties around regular black hole solutions obtained from non-linear electrodynamics
Kurmanov Y. Boshkayev K. Konysbayev T. Luongo O. Saiyp N. Urazalina A. Ikhsan G. Suliyeva G.
December 2024Elsevier B.V.
Physics of the Dark Universe
2024#46
We investigate a family of spherically symmetric, static, charged regular black hole solutions derived within the framework of Einstein-nonlinear electrodynamics. Our study focuses on examining the characteristics of accretion disks in the spacetimes described by the Dymnikova and Fan-Wang solutions. We explore circular geodesics of test particles and calculate various properties, including the radius of the innermost stable circular orbit, radiant energy, temperature, and conversion efficiency of accretion mass into radiation. We employ the Novikov-Thorne-Page thin accretion disk model as a background. By comparing our findings with those obtained in the Schwarzschild black hole case, we reveal significant modifications in the overall spectral properties. Specifically, we observe an increase in the energy emitted from the disk surface, resulting in higher temperatures for the accretion disks under certain values of the free parameters. Consequently, we note an enhanced efficiency of mass conversion into radiation compared to the Schwarzschild spacetime.
Accretion disk luminosity , Non-linear electrodynamics , Regular black holes
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National Nanotechnology Laboratory of Open Type, Almaty, 050040, Kazakhstan
Al-Farabi Kazakh National University, Al-Farabi av. 71, Almaty, 050040, Kazakhstan
International Engineering Technological University, Al-Farabi av. 93G/5, Almaty, 050060, Kazakhstan
Institute of Nuclear Physics, Ibragimova, 1, Almaty, 050032, Kazakhstan
Università di Camerino, Via Madonna delle Carceri 9, Camerino, 62032, Italy
SUNY Polytechnic Institute, Utica, 13502, NY, United States
Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia, 06123, Italy
INAF - Osservatorio Astronomico di Brera, Milano, Italy
Fesenkov Astrophysical Institute, Observatory 23, Almaty, 050020, Kazakhstan
National Nanotechnology Laboratory of Open Type
Al-Farabi Kazakh National University
International Engineering Technological University
Institute of Nuclear Physics
Università di Camerino
SUNY Polytechnic Institute
Istituto Nazionale di Fisica Nucleare
INAF - Osservatorio Astronomico di Brera
Fesenkov Astrophysical Institute
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