The Semiclassical Methods for Hawking Radiations on the Kerr – Newman – Vaidya Black Holes

Abstract

Abstract Hawking radiation can be described as particle tunnelling picture in semiclassical regime. In this research, we derived Hawking temperature and entropy of non-stationary black hole Kerr - Newman - Vaidya using two semiclassical methods, which are radial null geodesic and complex path analysis. These two calculations gave the same results. The Hawking temperature is, approximately, inversely proportional to the mass and non-stationary term. We also derived the entropy of the black hole that corresponds to the temperature formulations that were derived by semiclassical methods. The entropy formulations that were calculated obey generalized second law of black holes.