Bardeen-de Sitter black holes

TL;DR

This paper introduces a regular Bardeen-de Sitter black hole solution, analyzes its properties, and computes grey body factors and absorption cross sections for scalar fields, exploring parameter dependencies.

Contribution

It presents the first detailed analysis of grey body factors for Bardeen-de Sitter black holes, incorporating the effects of the cosmological constant and non-linear electrodynamics.

Findings

Grey body factors depend on mass, charge, and cosmological constant.

Partial absorption cross sections vary with black hole parameters.

The study provides insights into scalar field scattering in regular black hole backgrounds.

Abstract

In this paper we present a regular black hole with a positive cosmological constant. The regular black hole considered is the well known Bardeen black hole and it is a solution to the Einstein equations coupled to non-linear electrodynamics with a magnetic monopole. The paper discuss the properties of the Bardeen-de Sitter black hole. We have computed the grey body factors and partial absorption cross sections for massless scalar field impinges on this black hole with the third order WKB approximation. A detailed discussion on how the behavior of the grey body factors depend on the parameters of the theory such as the mass, charge and the cosmological constant is given. Possible extensions of the work is discussed at the end of the paper.