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Stars and quark stars in bumblebee gravity

Name: Stars and quark stars in bumblebee gravity
Keywords: High Energy Physics - Theory, Nuclear Theory (nucl-th), Nuclear Theory, High Energy Physics - Theory (hep-th), FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), General Relativity and Quantum Cosmology

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 01 Apr 2025Embargo end date: 01 Jan 2024Publisher:Elsevier BVJournal:Annals of Physics, volume 475, page 169,950 (issn: 0003-4916,

Authors: Juliano C.S. Neves; Fernando G. Gardim;

doi: 10.1016/j.aop.2025.169950 , 10.48550/arxiv.2409.20360

arXiv: http://arxiv.org/abs/2409.20360

Stars and quark stars in bumblebee gravity

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Abstract

In this work, the interior spacetime of stars is built in a Lorentz symmetry breaking model called bumblebee gravity. Firstly, we calculated the modified Tolman-Oppenheimer-Volkoff equation in this context of modified gravity. Then we show that the bumblebee field, responsible for the symmetry breaking, increases the star mass-radius relation when it assumes its vacuum expectation value. When compared to the general relativity mass-radius relation, a Lorentz symmetry breaking context, like the bumblebee gravity, could provide more massive stars, surpassing the $2.5 M_{\odot}$ limit as the interior of the star is described by quark matter with the MIT bag model. Also, we investigate the stability of the solution with the MIT bag equation of state in this context of modified gravity.

13 pages, 5 figures and 1 table. V3 with stability analysis section. Published in Annals of Physics

Keywords

High Energy Physics - Theory, Nuclear Theory (nucl-th), Nuclear Theory, High Energy Physics - Theory (hep-th), FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), General Relativity and Quantum Cosmology

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