Rapidly rotating compact stars in Rastall's gravity

TL;DR

This paper investigates the properties of rapidly rotating compact stars within Rastall's gravity, deriving numerical solutions for mass-radius relations and moments of inertia, and comparing them to non-rotating star models.

Contribution

It introduces a numerical analysis of rapidly rotating stars in Rastall's gravity, a less-explored alternative to general relativity, providing new insights into their structural properties.

Findings

Mass-radius relations differ from non-rotating stars.

Rotating stars exhibit increased moments of inertia.

Comparative analysis highlights effects of Rastall's gravity on star properties.

Abstract

In this work we study rapidly rotating stars by considering the Rastall theory of gravity. We obtain and solve the equations by numerical methods for two usual parametrization of polytropic stars. Then the mass-radius relations, moments of inertia and other results of interest are obtained and compared with the ones for non-rotating stars.