English

Stellar isotropic model in the symmetric teleparallel equivalent of general relativity theory

General Relativity and Quantum Cosmology 2025-04-08 v1 High Energy Physics - Theory

Abstract

Recently, the theory of symmetric teleparallel equivalent of general relativity (STEGR) has gained much interest in the cosmology and astrophysics community. Within this theory, we discuss the method of deriving a stellar isotropic model. In this respect, we implement the equations of motion of STEGR theory to a spacetime that is symmetric in a spherical manner, resulting in a set of nonlinear differential equations with more unknowns than equations. To solve this issue, we assume a special form of gttg_{tt}, and suppose a null value of the anisotropy to obtain the form of grrg_{rr}. We then investigate the possibility of obtaining an isotropic stellar model consistent with observational data. To test the stability of our model, we apply the adiabatic index and the Tolman-Oppenheimer-Volkoff equation. Furthermore, we examine our model using different observed values of radii and masses of pulsars, showing that all of them fit in a consistent way.

Keywords

Cite

@article{arxiv.2504.04890,
  title  = {Stellar isotropic model in the symmetric teleparallel equivalent of general relativity theory},
  author = {G. G. L. Nashed and Amare Abebe},
  journal= {arXiv preprint arXiv:2504.04890},
  year   = {2025}
}

Comments

10 pages,5 figures,