Accretion of matter by a Charged dilaton black hole
arXiv:2401.15654 · doi:10.1140/epjc/s10052-024-12856-w
Abstract
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.
arXiv comment9 pages, 3 figures
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