Bardeen–de Sitter black holes

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.

Anti-evaporation and evaporation of an n -dimensional Reissner-Nordström black hole

“…where ǫ is very small. A nearly extreme black hole will have the following form of function N (r) [46,47],…”

Determination of Mechanical Properties of Composite Supports Used in Catalytic Membranes for Hydrogen Production and Separation

“…The most preferred binder in ceramic industry is silica due to resistivity to high temperature. [12] The sintering temperature is also another parameter affecting the mechanical properties of supports. In general, flexural strength, flexural modulus and compressive strength increase as calcination temperature and Si/Al ratio increase in ceramic type supports fabricated.…”

Thermodynamics of the Bardeen black hole in anti-de Sitter space

“…And the thermodynamic quantities of the Bardeen black hole have been addressed in [14][15] [16]. Moreover, Sharmanthie Fernando studied the Bardeen black hole in de-Sitter space [17].…”