Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Ghalee, Amir"'
Autor:
Poro, Atila, Paki, Ehsan, Mazhari, Golnaz, Sarabi, Soroush, Alicavus, Filiz Kahraman, Farahani, Farzaneh Ahangarani, Guilani, Hamidreza, Popov, Alexander A., Zubareva, Alexandra M., Jalalabadi, Behjat Zarei, Nourmohammad, Mahshid, Davoudi, Fatemeh, Arani, Zahra Sabaghpour, Ghalee, Amir
The multi-color CCD photometric study of 27 Delta Scuti stars is presented. By using approximately three years of photometric observations, we obtained the times of maxima and magnitude changes during the observation time interval for each star. The
Externí odkaz:
http://arxiv.org/abs/2102.10136
Autor:
Ghalee, Amir
Observation of the cosmic microwave background is consistent with the $R^2$ model. In the $R^2$ model, there exists a dimensionless constant which must be assigned a very large value to reconcile the model with the data. We show that the large value
Externí odkaz:
http://arxiv.org/abs/2012.10889
Autor:
Davoudi, Fatemeh, MirshafieKhozani, PegahSadat, Paki, Ehsan, Roshana, Mojtaba, HashemiNasab, Fatemeh, MazidabadiFarahani, Ahmad, Farahani, Farzaneh Ahangarani, Farjadnia, Tayebeh, Nasrollahzadeh, Farshid, Rezvanpanah, Shiva, Mousavi, S. Mohammad Mahdi, Foroughi, Rahimeh, Poro, Atila, Ghalee, Amir
WASP-12 b, WASP-33 b, WASP-36 b, and WASP-46 b are four transiting planetary systems which we have studied. These systems' light curves were derived from observations made by the Transiting Light Exoplanet Survey Satellite (TESS) and some ground-base
Externí odkaz:
http://arxiv.org/abs/2012.01486
Autor:
Poro, Atila, Paki, Ehsan, Mazhari, Golnaz, Sarabi, Soroush, Alicavus, Filiz Kahraman, Farahani, Farzaneh Ahangarani, Guilani, Hamidreza, Popov, Alexander A., Zubareva, Alexandra M., Jalalabadi, Behjat Zarei, Nourmohammad, Mahshid, Davoudi, Fatemeh, Arani, Zahra Sabaghpour, Ghalee, Amir
Publikováno v:
Publications of the Astronomical Society of the Pacific, 2021 Aug 01. 133(1026), 1-17.
Externí odkaz:
https://www.jstor.org/stable/27206402
Autor:
Ghalee, Amir
We present a new mechanism to condense a scalar field coupled to the Gauss-Bonnet term. We propose a scenario in which the condensed state will emerge from the background energy density in the late-Universe. During the radiation and dust-dominated er
Externí odkaz:
http://arxiv.org/abs/1807.08620
Autor:
Ghalee, Amir
Publikováno v:
Eur. Phys. J. C 76: 136, 2016
We study the metric perturbations in the context of restricted $f(R)$ gravity, in which a parameter for deviation from the full diffeomorphisms of space-time is introduced. We demonstrate that one can choose the parameter to remove the induced anisot
Externí odkaz:
http://arxiv.org/abs/1510.05353
Autor:
Ghalee, Amir
Publikováno v:
Phys. Rev. D 90:067503, 2014
We consider a scalar field with a kinetic term non-minimally coupled to gravity in an anisotropic background. Various potentials for the scalar field are considered. By explicit examples, we show that how the anisotropy can change the dynamics of the
Externí odkaz:
http://arxiv.org/abs/1407.5421
Autor:
Ghalee, Amir
We explore the inflationary phase of a scalar field with a kinetic term non-minimally coupled to gravity. We find that one of the slow-roll conditions is naturally consequence of the equation of motion of the scalar field. Thus, slow-roll conditions
Externí odkaz:
http://arxiv.org/abs/1402.6798
Autor:
Ghalee, Amir
Publikováno v:
Phys. Rev. D 88: 083528, 2013
We propose a model for the dust matter in the cosmological context. The model contains a scalar field with a kinetic term nonminimally coupled to gravity. By investigating the background and perturbative equations, it is demonstrated that the scalar
Externí odkaz:
http://arxiv.org/abs/1309.5161
Autor:
Ghalee, Amir
Publikováno v:
Phys. Lett. B 724:198-202,(2013)
We consider the dynamics of a scalar field non-minimally coupled to gravity in the context of cosmology. It is demonstrated that there exists a new phase for the scalar field, in addition to the inflationary and dust-like (reheating period) phases. A
Externí odkaz:
http://arxiv.org/abs/1303.0532