On surface tension for compact stars

TL;DR

This paper explores how pressure anisotropy in compact stars affects surface tension, showing that anisotropy can significantly decrease surface tension values compared to isotropic models, with implications for strange star physics.

Contribution

It introduces a modified TOV equation accounting for anisotropic matter, revealing the impact of anisotropy on surface tension in compact stars.

Findings

Anisotropy can drastically reduce surface tension values.

Pressure anisotropy leads to a wider range of surface tension behaviors.

Anisotropic models differ significantly from isotropic ones in surface tension predictions.

Abstract

In an earlier treatment it was demonstrated that general relativity gives higher values of surface tension in strange stars with quark matter than neutron stars.We generate the modified Tolman-Oppenheimer-Volkoff equation to incorporate anisotropic matter and use this to show that pressure anisotropy provides for a wide range of behaviour in the surface tension than is the case with isotropic pressures. In particular it is possible that anisotropy drastically decreases the value of the surface tension.