Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Fatimah Shojai"'
Publikováno v:
Physics Letters B, Vol 770, Iss C, Pp 43-49 (2017)
We have found some analytical cosmological solutions to MOdified Gravity (MOG). These solutions describe different evolutionary epochs of an isotropic and homogeneous universe. During each epoch, the evolution of cosmological perturbation is studied
Externí odkaz:
https://doaj.org/article/db5ccc8416dd42eb832739c32f898ae1
Since 1984, a series of regional conferences on mathematical physics has been organized by physicists from Iran, Pakistan and Turkey to promote the research in mathematical and theoretical physics in the region. This volume, which derives from the XI
Publikováno v:
Journal of Cosmology and Astroparticle Physics, 2022 (9)
We generate new spherical and time-dependent solutions of viable Horndeski gravity by disforming a solution of the Einstein equations with scalar field source and positive cosmological constant. They describe dynamical objects embedded in asymptotica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f572f4eb4e2b83128f0144a1a38fd2f1
http://arxiv.org/abs/2207.07060
http://arxiv.org/abs/2207.07060
Autor:
S. M. M. Rasouli, Fatimah Shojai
In this paper, we study the geodesic deviation equation (GDE) within the context of the Brans-Dicke (BD) theory in $D$ dimensions. Then, we restrict our attention to the GDE for the fundamental observers and null vector field past directed. Concernin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f39ca362246bdf94e508f7c901bcecf2
It is well-known that in order to make the action well defined, one may employ different kinds of boundary conditions (BCs) accompanied by the appropriate Gibbons-Hawking-York (GHY) terms. In this paper we investigate the role of the selected BC and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40699ceb7affe52df9be6ad29c651dbc
http://arxiv.org/abs/2005.11697
http://arxiv.org/abs/2005.11697
Autor:
Fatimah Shojai, H. Khodabakhshi
Using some probes, the violation of cosmic censorship conjecture in a general Kerr-Newman black hole is investigated. The result depends on many factors, like the relative sign of charge and rotation direction of the probe and black hole. Moreover th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8bab31e35e3f9c50f3467618dfb72f9a
Autor:
R. Saadati, Fatimah Shojai
Publikováno v:
Classical and Quantum Gravity. 38:135025
We present some new aspects of Kiselev black hole and then study the null and timelike thin shell collapse in this space-time. For the latter, we show that Kiselev black hole can be matched to de Sitter core with a thin timelike dust shell to produce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afd1f55dae12fe9062ce3f9d2ac9afc9
https://doi.org/10.1088/1361-6382/abfed5
https://doi.org/10.1088/1361-6382/abfed5
Publikováno v:
Physics Letters B
Physics Letters B, Vol 770, Iss C, Pp 43-49 (2017)
Physics Letters B, Vol 770, Iss C, Pp 43-49 (2017)
We have found some analytical cosmological solutions to MOdified Gravity (MOG). These solutions describe different evolutionary epochs of an isotropic and homogeneous universe. During each epoch, the evolution of cosmological perturbation is studied
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b36bf990f56e7e58573fcf187681e97c
https://doi.org/10.1016/j.physletb.2017.04.029
https://doi.org/10.1016/j.physletb.2017.04.029
Autor:
R. Saadati, Fatimah Shojai
As a local effect of dynamical dark energy, bending of light in the presence of a spherically symmetric and static black hole surrounded by quintessence has been studied. Having in mind recent observational data, we have treated the problem as a devi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::605ad70d7f2d3213cac733074e8d3ee4
http://arxiv.org/abs/1910.13499
http://arxiv.org/abs/1910.13499
Autor:
Fatimah Shojai, S. Cheraghchi
In this article we study the gauge invariant effective energy momentum tensor for cosmological perturbations in f(R) gravity during the inflationary epoch. Considering the super-horizon regime, we derive the effective energy density up to the one-loo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b683537075b7227bfe403054f7c89e74
http://arxiv.org/abs/1910.11066
http://arxiv.org/abs/1910.11066