Accretion disks around magnetically charged black holes in string theory with an Euler-Heisenberg correction

TL;DR

This paper models accretion disks around magnetically charged black holes in string theory, incorporating Euler-Heisenberg corrections, and compares their properties with other black hole solutions.

Contribution

It introduces a relativistic model for accretion disks around magnetically charged black holes with Euler-Heisenberg corrections, deriving constraints and key disk properties.

Findings

Derived constraints on black hole parameters from energy conditions.

Calculated disk properties such as flux, temperature, and luminosity.

Compared accretion disk features with other black hole models.

Abstract

A relativistic model of geometrically thin and optically thick accretion disks is worked out for a class of magnetically charged black holes, which are solutions to the Einstein-Maxwell-dilaton theory with a dilaton-coupled Euler-Heisenberg correction. Constraints on black hole parameters are derived from the subextremality condition and energy conditions. The Keplerian orbits, the time-averaged energy flux, the local temperature, the specific luminosity and the conversion efficiency of accreting mass into radiation are obtained and compared with Schwarzschild and Gibbons-Maeda-Garfinkle-Horowitz-Strominger black holes.