Adiabatic accretion onto black holes in Einstein-Maxwell-scalar theory
Haiyuan Feng, Miao Li, Gui-Rong Liang, Rong-Jia Yang
Abstract
Abstract We study the adiabatic accretion process of ordinary baryonic gas onto spherically symmetric black holes in Einstein-Maxwell-scalar theory, with two parameters α and β 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.
Topics & Concepts
PhysicsAdiabatic processDimensionless quantityBlack hole (networking)Accretion (finance)Circular symmetryScalar (mathematics)Classical mechanicsMathematical physicsAstrophysicsQuantum mechanicsGeometryRouting (electronic design automation)Computer networkComputer scienceRouting protocolLink-state routing protocolMathematicsAstrophysical Phenomena and ObservationsCosmology and Gravitation TheoriesBlack Holes and Theoretical Physics