Adiabatic accretion onto black holes in Einstein-Maxwell-scalar theory

Abstract

We study the adiabatic accretion process of ordinary baryonic gas onto spherically symmetric black holes in Einstein-Maxwell-scalar theory, with two parameters $\alpha$ and $\beta$ in the coupling term. Especially, we demonstrate the range of the transonic points in terms of the charge-to-mass ratio squared and the dimensionless coordinate radius, in two important classes of black holes as examples. Further, we find that the two coupling parameters give modifications to the mass accretion rate at different orders of the sound speed at infinity. We also present their different effects on the temperature ratios of the accreted gas.

17 pages, 4 figures

References in corpus (12)

• Charged Black Holes in Phantom Cosmology
• Does the mass of a black hole decrease due to the accretion of phantom energy
• Ultra-hard fluid and scalar field in the Kerr-Newman metric
• Accretion onto a black hole in a string cloud background
• Phantom Accretion by Five Dimensional Charged Black Hole
• Accretion of Dark Matter onto a Moving Schwarzschild Black Hole: An Exact Solution
• Axisymmetric Bondi-Hoyle accretion onto a Schwarzschild Black Hole: shock cone vibrations
• Phantom Energy Accretion onto Black Holes in Cyclic Universe
• Accretion of Phantom Energy and Generalized Second Law of Thermodynamics for Einstein-Maxwell-Gauss-Bonnet Black Hole
• Thin accretion disks and charged rotating dilaton black holes
• Spherically-symmetric Accretion onto a Black Hole at the Center of a Young Stellar Cluster
• A simple accretion model of a rotating gas sphere onto a Schwarzschild black hole

Cited by in corpus (1)

• Black Holes with Abelian and Non-Abelian Charges and Their Impact on Matter Accretion Flows