Exact solution for accretion onto a moving charged dilaton black hole

TL;DR

This paper provides an exact analytical solution for the accretion process of a gaseous medium onto a moving charged dilaton black hole, revealing how black hole parameters influence accretion dynamics.

Contribution

It introduces the first exact solution for accretion onto a moving charged dilaton black hole, detailing the flow velocity, density, and accretion rate dependencies on black hole parameters.

Findings

Flow possesses axial symmetry

Accretion rate depends on black hole mass, charge, and dilation

Results aid understanding of near-horizon accretion behavior

Abstract

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.