Regular Article - Theoretical Physics
Exact solution for accretion onto a moving charged dilaton black hole
College of Physics Science and Technology, Hebei University, 071002, Baoding, China
2 Hebei Key Lab of Optic-Electronic Information and Materials, Hebei University, 071002, Baoding, China
3 National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei University, 071002, Baoding, China
4 Key Laboratory of High-Precision Computation and Application of Quantum Field Theory of Hebei Province, Hebei University, 071002, Baoding, China
5 School of Physics and Astronomy, Sun Yat-Sen University, 519082, Zhuhai, China
Accepted: 23 May 2022
Published online: 2 June 2022
We present an analytic solution for accretion of a gaseous medium with adiabatic equation of state onto a charged dilaton black hole which moves at a constant velocity. We determine the four-velocity of accreted flow and find that it possesses axial symmetry. We obtain the particle number density and the accretion rate which depend on the mass, the magnetic charge, and the dilation of black hole, meaning that these parameters take important roles in the process of accretion. Possible theoretical and observational constraints on the parameter related to the dilation are discussed. The results may help us to get deeper understanding of the behavior of accreted flow near the event horizon of black hole.
© The Author(s) 2022
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