Zobrazeno 1 - 10
of 22
pro vyhledávání: '"A. Emrah Yükselci"'
Publikováno v:
Physics Letters B, Vol 851, Iss , Pp 138564- (2024)
In the presence of the gravitational field, the energy density of matter no longer coincides with its mass density. A discrepancy exists, of course, also between the associated power spectra. Within the Λ CDM model, we derive a formula that relates
Externí odkaz:
https://doaj.org/article/872f4c2452524cabbc978a19a43af9e4
Publikováno v:
Physics Letters B, Vol 826, Iss , Pp 136911- (2022)
We compare two competing relativistic approaches to the N-body simulation of the Universe large-scale structure. To this end, employing the corresponding alternative computer codes (“gevolution” and “screening”), we conduct a series of cosmol
Externí odkaz:
https://doaj.org/article/679be403ee324ef48b097daf4381ec84
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 8, Pp 1-8 (2019)
Abstract Within the cosmic screening approach, we obtain the exact formulas for the velocity-independent gravitational potentials produced by matter in the form of discrete sources distributed in the open and closed Universes. These formulas demonstr
Externí odkaz:
https://doaj.org/article/fd331bf67b9b465fa8a8d86a24ebb203
Publikováno v:
Physics Letters B, Vol 809, Iss , Pp 135761- (2020)
We consider a universe filled with perfect fluid with the constant equation of state parameter ω. In the theory of scalar perturbations, we study the effect of peculiar velocities on the gravitational potential. For radiation with ω=1/3, we obtain
Externí odkaz:
https://doaj.org/article/518dd6b9cbdc4260baf3e5aa683c4436
Autor:
Savaş Arapoğlu, A., Emrah Yükselci, A.
Publikováno v:
In Physics of the Dark Universe May 2020 28
Publikováno v:
In Physics Letters B April 2024 851
Autor:
A. Emrah Yükselci, A. Savaş Arapoğlu
Publikováno v:
Physics of the Dark Universe. 40:101176
We investigate first-order vacuum phase transitions in the presence of a non-minimally coupled scalar field starting with the coupling effect on the initial dynamics of phase transitions by defining an effective potential for the scalar field and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bcd41c34fe94a84cd60c508e84dd7e5
https://doi.org/10.1016/j.dark.2023.101176
https://doi.org/10.1016/j.dark.2023.101176
We numerically examine the exterior solution of spherically symmetric and static configuration in scalar-tensor theories by using the nonminimally coupled scalar field with zero potential as our sample model. Our main purpose in this work is to fit t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a3bee0099e3f38c4793e9e673e799fa
Publikováno v:
Physics Letters B, Vol 809, Iss, Pp 135761-(2020)
Physics Letters
Physics Letters
We consider a universe filled with perfect fluid with the constant equation of state parameter $\omega$. In the theory of scalar perturbations, we study the effect of peculiar velocities on the gravitational potential. For radiation with $\omega=1/3$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94408e2757273f1a595667146c1a3d03
http://arxiv.org/abs/2005.06237
http://arxiv.org/abs/2005.06237
Autor:
A. Emrah Yükselci, A. Savaş Arapoğlu
We study the structure of spherically symmetric and static objects in the presence of a nonminimally coupled scalar field having a potential of the form $V(\phi)=-\mu^2\phi^2/2+\lambda\phi^4/4$. We numerically solve equations of the system using two
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d81fe98cfffae407cffce5a7f64391f4
http://arxiv.org/abs/2002.03025
http://arxiv.org/abs/2002.03025