326 citations · 2.3k across the 93 of their papers we have counts for
93 papers
On null geodesics and shadow of hairy black holes in Einstein-Maxwell-dilaton gravity
Mohaddese Heydari-Fard, Malihe Heydari-Fard, Hamid Reza Sepangi
The time-like and null-like geodesics around compact objects are some of the best tools to classify and understand the structure of a space-time. In this paper, we study the null g…
Thin accretion disks around rotating black holes in Einstein-Gauss-Bonnet gravity
Mohaddese Heydari-Fard, Malihe Heydari-Fard, Hamid Reza Sepangi
Recently, Kumar and Ghosh have derived Kerr-like rotating black hole solutions in the framework of four-dimensional Einstein-Gauss-Bonnet theory of gravity and investigated the bla…
Instability and no-hair paradigm in d-dimensional charged-AdS black holes
Afsaneh Rahmani, Mohsen Khodadi, Matin Honardoost +1
Is it possible the no-hair paradigm is violated when a black hole undergoes an instability? Employing massless charged scalar perturbations, we address this question within the con…
Thin accretion disk signatures of scalarized black holes in Einstein-scalar-Gauss-Bonnet gravity
Mohaddese Heydari-Fard, Hamid Reza Sepangi
Einstein-scalar-Gauss-Bonnet gravity has recently been known to exhibit spontaneous scalarization. In the presence of the Gauss-Bonnet term the no-hair theorem can be evaded and no…
Thin accretion disks and charged rotating dilaton black holes
Mohaddese Heydari-fard, Malihe Heydari-Fard, Hamid Reza Sepangi
Einstein-Maxwell-dilaton theory is an interesting theory of gravity for studying scalar fields in the context of no-hair theorem. In this work, we consider static charged dilaton a…
Thermal phase transition in -charged -scalar theory
A. Rahmani, M. Honardoost, H. R. Sepangi
We investigate instabilities of -charged black holes by a massive charged scalar field in a linear perturbation regime. We study tachyonic instabilities as the near…