Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Özcan Sert"'
Autor:
Özcan Sert
Publikováno v:
Nuclear Physics B, Vol 1006, Iss , Pp 116651- (2024)
Since the general relativistic approach requires exotic matter with negative energy density, constructing wormholes containing realistic matter is a crucial challenge. Therefore, extending General Relativity to non-minimal cases may be an alternative
Externí odkaz:
https://doaj.org/article/05c6c9646b44446f8f66a9fceb67c0e2
Autor:
Özcan Sert, Muzaffer Adak
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-7 (2021)
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
Externí odkaz:
https://doaj.org/article/d415fe8b3c2547b68a8594c960bcf280
Autor:
Özcan Sert, Fatma Çeliktaş
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 7, Pp 1-7 (2020)
Abstract We use Noether symmetry approach to find spherically symmetric static solutions of the non-minimally coupled electromagnetic fields to gravity. We construct the point-like Lagrangian under the spherical symmetry assumption. Then we determine
Externí odkaz:
https://doaj.org/article/141cebb9efc64a3ab88207ee73b99719
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 10, Pp 1-11 (2018)
Abstract We investigate anisotropic compact stars in the non-minimal $$Y(R)F^2$$ Y(R)F2 model of gravity which couples an arbitrary function of curvature scalar Y(R) to the electromagnetic field invariant $$F^2$$ F2 . After we obtain exact anisotropi
Externí odkaz:
https://doaj.org/article/7333b84415a447d3b3f0c31d78dbdca7
Autor:
Özcan Sert
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 3, Pp 1-10 (2018)
Abstract We investigate the gravitational models with the non-minimal $$Y(R)F^2$$ Y(R)F2 coupled electromagnetic fields to gravity, in order to describe charged compact stars, where Y(R) denotes a function of the Ricci curvature scalar R and $$F^2$$
Externí odkaz:
https://doaj.org/article/95851359788c4042a7808980331298d2
Autor:
Özcan SERT
Publikováno v:
International Journal of Politics and Security.
Bulgaristan kurulduğu 1878 yılından itibaren nüfusu artan bir ülke olmuştur. Ancak bu eğilim ülkenin siyasi ve iktisadi sisteminin değiştiği 1989 yılından sonra tersine dönmüştür. Zorla ismi değiştirilen on binlerce Türkün yanı
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c5452a9c95ad50b3fd39335889ebabad
https://doi.org/10.53451/ijps.1271301
https://doi.org/10.53451/ijps.1271301
Autor:
Muzaffer Adak, Özcan Sert
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-7 (2021)
European Physical Journal
European Physical Journal
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::761d552b99d013f028515da8aeb07d75
https://doaj.org/article/d415fe8b3c2547b68a8594c960bcf280
https://doaj.org/article/d415fe8b3c2547b68a8594c960bcf280
Autor:
Özcan Sert
The cosmological solutions of the non-minimal $ Y (R)F^2 $ theory which are compatible with FRW space-time are investigated. In order to avoid the isotropy violation of a vector field, it can be considered that the presence of a triplet of vector fie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49919539eb4808ac0739e6bac2db3ca8
Autor:
Özcan Sert, Muzaffer Adak
We investigate anisotropic cosmological solutions of the theory with non-minimal couplings between electromagnetic fields and gravity in $Y(R) F^2$ form. After we derive the field equations by the variational principle, we look for spatially flat cos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ad4c45eb2478313daa77e8d4b307f7a
Publikováno v:
Journal of Cosmology and Astroparticle Physics
We consider the non-minimal model of gravity in $Y(R) F^2$-form. We investigate a particular case of the model, for which the higher order derivatives are eliminated but the scalar curvature $R$ is kept to be dynamical via the constraint $Y_RF_{mn}F^
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::960492bfebec40b782c7a9692ad69c60
https://hdl.handle.net/11499/26204
https://hdl.handle.net/11499/26204