https://doi.org/10.1140/epjc/s10052-024-12856-w
Regular Article - Theoretical Physics
Accretion of matter by a charged dilaton black hole
1
College of Physical Science and Technology, Hebei University, 071002, Baoding, China
2
Yunnan Observatories, Chinese Academy of Sciences, 650216, Kunming, China
3
Hebei Key Lab of Optic-Electronic Information and Materials, Hebei University, 071002, Baoding, China
4
National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei University, 071002, Baoding, China
5
Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, Hebei University, 071002, Baoding, China
Received:
31
January
2024
Accepted:
25
April
2024
Published online:
14
May
2024
Considering accretion onto a charged dilaton black hole, the fundamental equations governing accretion, general analytic expressions for critical points, critical velocity, critical speed of sound, and ultimately the mass accretion rate are obtained. A new constraint on the dilation parameter coming from string theory is found and the case for polytropic gas is delved into a detailed discussion. It is found that the dialtion and the adiabatic index of accreted material have deep effects on the accretion process.
© The Author(s) 2024
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