English

Stable and self-consistent compact star models in teleparallel gravity

General Relativity and Quantum Cosmology 2020-12-02 v1 High Energy Astrophysical Phenomena High Energy Physics - Theory

Abstract

In the framework of Teleparallel Gravity, we derive a charged non-vacuum solution for a physically symmetric tetrad field with two unknown functions of radial coordinate. The field equations result in a closed-form adopting particular metric potentials and a suitable anisotropy function combined with the charge. Under these circumstances, it is possible to obtain a set of configurations compatible with observed pulsars. Specifically, boundary conditions for the interior spacetime are applied to the exterior Reissner-Nordstr\"om metric to constrain the radial pressure that has to vanish through the boundary. Starting from these considerations, we are able to fix the model parameters. The pulsar PSR J 1614–2230\textit {PSR J 1614--2230}, with estimated mass M=1.97±0.04M,M= 1.97 \pm 0.04\, M_{\circledcirc}, and radius R=9.69±0.2R= 9.69 \pm 0.2 km is used to test numerically the model. The stability is studied, through the causality conditions and adiabatic index, adopting the Tolman-Oppenheimer-Volkov equation. The mass-radius (M,R)(M,R) relation is derived. Furthermore, the compatibility of the model with other observed pulsars is also studied. We reasonably conclude that the model can represent realistic compact objects.

Keywords

Cite

@article{arxiv.2010.06355,
  title  = {Stable and self-consistent compact star models in teleparallel gravity},
  author = {Gamal G. L. Nashed and Salvatore Capozziello},
  journal= {arXiv preprint arXiv:2010.06355},
  year   = {2020}
}

Comments

21 pages, 14 figures, accepted for publication in EPJC

R2 v1 2026-06-23T19:18:33.418Z