Zobrazeno 1 - 10
of 114
pro vyhledávání: '"Ghaffarnejad, Hossein"'
Our motivation in this work is due to the great importance of relativistic boson stars as fierce competitors of black holes which from theoretical perspective they described by some KG complex scalar waves interacting with curved background in genera
Externí odkaz:
http://arxiv.org/abs/2402.00061
Publikováno v:
Journal of cosmology and astroparticle physics 2023
In this work, we choose a minimal coupling interaction between massive Klein Gordon (KG) quantum scalar free fields and Janis-Newman-Winicour (JNW) spherically symmetric static black hole, to produce its Hawking temperature and luminosity. This is do
Externí odkaz:
http://arxiv.org/abs/2309.03096
Autor:
Ghaffarnejad, Hossein, Ghasemi, Elham
We generalize the Einstein Maxwell gravity by an additional term which is made by contraction of the Ricci tensor and the electromagnetic antisymmetric Maxwell tensor field, to study thermodynamic of a modified Reissner-Nordstr\"{o}m (RN) black hole.
Externí odkaz:
http://arxiv.org/abs/2306.17296
Autor:
Ghaffarnejad, Hossein
Publikováno v:
Physica Scripta 2023
We consider a non-minimally coupled Einstein-Maxwell gravity with no $U(1)$ symmetry property to study stability of an electrostatic star via canonical quantization approach and obtain that the stability is free of gauge field effects. By calculating
Externí odkaz:
http://arxiv.org/abs/2306.10285
Publikováno v:
General Relativity and Gravitation 2023
We use a modified Einstein-Maxwell gravity to study stability of an electrostatic spherical star. Correction terms in this model are scalers which are made from contraction of Ricci tensor and electromagnetic vector potential. Our motivation to use t
Externí odkaz:
http://arxiv.org/abs/2301.00682
Autor:
Ghaffarnejad, Hossein, Naderi, Leyla
Publikováno v:
Iranian Journal of Astronomy & Astrophysics 2024
As an alternative gravity model we consider an extended Einstein-Maxwell gravity containing a gauge invariance property. Extension is assumed to be addition of a directional coupling between spatial electromagnetic fields with the Ricci tensor. We wi
Externí odkaz:
http://arxiv.org/abs/2212.09485
Autor:
Ghasemi, Elham, Ghaffarnejad, Hossein
Publikováno v:
Iranian Journal of Astronomy and Astrophysics 2023
In this paper, the Joule-Thomson (JT) adiabatic expansion is investigated for generalized Ayon-Beato-Garcia (ABG) regular black hole. It has a magnetic charge which makes central region of the black hole metric to be AdS spacetime and so become non s
Externí odkaz:
http://arxiv.org/abs/2205.15741
Autor:
Ghasemi, Elham, Ghaffarnejad, Hossein
Publikováno v:
Journal of Holography Applications in Physics(2022)
In this letter we choose generalized Ayon Beato Gracia (ABG) magnetic charged black hole with five parameters to investigate possibility of thermodynamic phase transition and coexistence of different gass/liquid/solid phases of this black hole. In fa
Externí odkaz:
http://arxiv.org/abs/2204.02979
Autor:
Ghasemi, Elham, Ghaffarnejad, Hossein
Publikováno v:
Advances In High Energy Physics 2023
In this work we study thermodynamics of generalized Ayon-Beato and Garcia (ABG) black hole metric which contains three parameters named as mass $m$, magnetic charge $q$ and dimensionless coupling constant of nonlinear electrodynamics interacting fiel
Externí odkaz:
http://arxiv.org/abs/2201.08389
Publikováno v:
Iranian Journal of Astronomy and Astrophysics 2023
According to AdS/DL (Anti de Sitter/ Deep Learning) correspondence given by \cite{Has}, in this paper with a data-driven approach and leveraging holography principle we have designed an artificial neural network architecture to produce metric field o
Externí odkaz:
http://arxiv.org/abs/2108.07161