Stable and self-consistent compact star models in teleparallel gravity
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 , with estimated mass and radius 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 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