Gravastars in a non-minimally coupled gravity with electromagnetism

Abstract In this paper we investigate the gravitational vacuum stars which called gravastars in the non-minimally coupled models with electromagnetic and gravitational fields. We consider two non-minimal models and find the corresponding spherically symmetric exact solutions in the interior of the s...

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Autores principales:	Özcan Sert, Muzaffer Adak
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/d415fe8b3c2547b68a8594c960bcf280
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spelling	oai:doaj.org-article:d415fe8b3c2547b68a8594c960bcf2802021-11-21T12:10:07ZGravastars in a non-minimally coupled gravity with electromagnetism10.1140/epjc/s10052-021-09804-31434-60441434-6052https://doaj.org/article/d415fe8b3c2547b68a8594c960bcf2802021-11-01T00:00:00Zhttps://doi.org/10.1140/epjc/s10052-021-09804-3https://doaj.org/toc/1434-6044https://doaj.org/toc/1434-6052Abstract In this paper we investigate the gravitational vacuum stars which called gravastars in the non-minimally coupled models with electromagnetic and gravitational fields. We consider two non-minimal models and find the corresponding spherically symmetric exact solutions in the interior of the star consisting of the dark energy condensate. Our models turn out to be Einstein–Maxwell model at the outside of the star and the solutions become the Reissner–Nordström solution. The physical quantities of these models are continuous and non-singular in some range of parameters and the exterior geometry continuously matches with the interior geometry at the surface. We calculate the matter mass, the total gravitational mass, the electric charge and redshift of the star for the two models. We notice that these quantities except redshift are dependent of a subtle free parameter, k, of the model. We also remark a wide redshift range from zero to infinity depending on one free parameter, $$\beta $$ β , in the second model.Özcan SertMuzaffer AdakSpringerOpenarticleAstrophysicsQB460-466Nuclear and particle physics. Atomic energy. RadioactivityQC770-798ENEuropean Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Özcan Sert Muzaffer Adak Gravastars in a non-minimally coupled gravity with electromagnetism
description	Abstract In this paper we investigate the gravitational vacuum stars which called gravastars in the non-minimally coupled models with electromagnetic and gravitational fields. We consider two non-minimal models and find the corresponding spherically symmetric exact solutions in the interior of the star consisting of the dark energy condensate. Our models turn out to be Einstein–Maxwell model at the outside of the star and the solutions become the Reissner–Nordström solution. The physical quantities of these models are continuous and non-singular in some range of parameters and the exterior geometry continuously matches with the interior geometry at the surface. We calculate the matter mass, the total gravitational mass, the electric charge and redshift of the star for the two models. We notice that these quantities except redshift are dependent of a subtle free parameter, k, of the model. We also remark a wide redshift range from zero to infinity depending on one free parameter, $$\beta $$ β , in the second model.
format	article
author	Özcan Sert Muzaffer Adak
author_facet	Özcan Sert Muzaffer Adak
author_sort	Özcan Sert
title	Gravastars in a non-minimally coupled gravity with electromagnetism
title_short	Gravastars in a non-minimally coupled gravity with electromagnetism
title_full	Gravastars in a non-minimally coupled gravity with electromagnetism
title_fullStr	Gravastars in a non-minimally coupled gravity with electromagnetism
title_full_unstemmed	Gravastars in a non-minimally coupled gravity with electromagnetism
title_sort	gravastars in a non-minimally coupled gravity with electromagnetism
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/d415fe8b3c2547b68a8594c960bcf280
work_keys_str_mv	AT ozcansert gravastarsinanonminimallycoupledgravitywithelectromagnetism AT muzafferadak gravastarsinanonminimallycoupledgravitywithelectromagnetism
_version_	1718419213278773248

Gravastars in a non-minimally coupled gravity with electromagnetism

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