Greybody Factor and Hawking Radiation of Charged Dilatonic Black Holes

TL;DR

This paper calculates the greybody factor and Hawking temperature of charged dilatonic black holes, showing that the temperature aligns with surface gravity predictions and is unaffected by charge, using scalar field dynamics.

Contribution

It provides a semi-classical analysis of Hawking radiation for charged dilatonic black holes, confirming temperature independence from charge and matching surface gravity results.

Findings

Hawking temperature matches surface gravity calculations.

Greybody factor computed for charged dilatonic black holes.

Temperature is independent of the black hole's electric or magnetic charge.

Abstract

The greybody factor and the Hawking temperature for a class of asymptotically flat charged dilatonic black holes are computed by using the low-energy dynamics of scalar fields in the black hole background. In the semi-classical approximation, the Hawking temperature has a good agreement with the one computed from the surface gravity, which is independent of the magnetic (or electric) charges of dilatonic black holes.