123 citations · 1k across the 33 of their papers we have counts for
34 papers
Accretion Disks in Schwarzschild-MOG and Kerr-MOG Backgrounds: MOG Parameter in terms of Observational Quantities
José Miguel Rojas, Mehrab Momennia
We apply a general relativistic framework to static and rotating black hole solutions in Scalar-Tensor-Vector Gravity or modified gravity (MOG). Our results yield exact analytic, c…
Cosmological redshift of a Schwarzschild-de Sitter black hole: Towards estimating the Hubble constant
Deborah Villaraos, Alfredo Herrera-Aguilar, Mehrab Momennia +1
In this work we estimate the parameters of several astrophysical black holes hosted at the core of active galactic nuclei by studying the kinematics of test objects in their accret…
Bondi-type accretion onto a Kerr black hole in the kinetic regime
Patryk Mach, Mehrab Momennia, Olivier Sarbach
We derive an exact solution representing a Bondi-type stationary accretion of a kinetic (Vlasov) gas onto the Kerr black hole. The solution is exact in the sense that relevant phys…
Accretion of a Vlasov gas by a Kerr black hole
Patryk Mach, Mehrab Momennia, Olivier Sarbach
We investigate the accretion of a collisionless, relativistic kinetic gas by a rotating Kerr black hole, assuming that at infinity the state of the gas is described by a distributi…
Spherical accretion of a collisionless kinetic gas into a generic static black hole
Mehrab Momennia, Olivier Sarbach
We present a nontrivial extension of the problem of spherical accretion of a collisionless kinetic gas into the standard Schwarzschild black hole. This extension consists of replac…
Novel echoes from black holes in conformal Weyl gravity
Mehrab Momennia
We reveal a novel class of echoes from black holes in conformal Weyl gravity and show that they are generated due to the large-scale structure of the cosmos, rather than near-horiz…
Kerr black hole parameters and its distance from the Earth in terms of directly measurable quantities of accretion disk
Mehrab Momennia
We extract elegant and concise analytic formulae for the mass and rotation parameters of the Kerr black hole as well as its distance from the Earth only in terms of directly measur…
Mass, charge, and distance to Reissner-Nordström black hole in terms of directly measurable quantities
Gerardo Morales-Herrera, Pablo Ortega-Ruiz, Mehrab Momennia +1
In this paper, we employ a general relativistic formalism and develop new theoretical tools that allow us to analytically express the mass and electric charge of the Reissner-Nords…
Schwarzschild black hole and redshift rapidity: A new approach towards measuring cosmic distances
Mehrab Momennia, Pritam Banerjee, Alfredo Herrera-Aguilar +1
Motivated by recent achievements of a full general relativistic method in estimating the mass-to-distance ratio of supermassive black holes hosted at the core of active galactic nu…
Observational redshift from general spherically symmetric black holes
Diego A. Martinez-Valera, Mehrab Momennia, Alfredo Herrera-Aguilar
In this work, we obtain an expression for the total observational frequency shift of photons emitted by massive geodesic particles circularly orbiting a black hole in a general sph…
Kerr black hole in de Sitter spacetime and observational redshift: Toward a new method to measure the Hubble constant
Mehrab Momennia, Alfredo Herrera-Aguilar, Ulises Nucamendi
We extract the Hubble law by the frequency-shift considerations of test particles revolving the Kerr black hole in asymptotically de Sitter spacetime. To this end, we take into acc…
Estimating the mass-to-distance ratio for a set of megamaser AGN black holes by employing a general relativistic method
A. González-Juárez, M. Momennia, A. Villalobos-Ramírez +1
Context. Motivated by the recent achievements of a full general relativistic method in determining black hole (BH) parameters, we continue to estimate the mass-to-distance ratio of…
Quasinormal modes of self-dual black holes in loop quantum gravity
Mehrab Momennia
We study the evolution of a test scalar field on the background geometry of a regular loop quantum black hole (LQBH) characterized by two loop quantum gravity (LQG) correction para…
Mass and spin of Kerr black holes in terms of observational quantities: The dragging effect on the redshift
Pritam Banerjee, Alfredo Herrera-Aguilar, Mehrab Momennia +1
In this work, we elaborate on the development of a general relativistic formalism that allows one to analytically express the mass and spin parameters of the Kerr black hole in ter…
Stability and phase transition of rotating Kaluza-Klein black holes
Seyed Hossein Hendi, Somayeh Hajkhalili, Mubasher Jamil +1
In this paper, we investigate thermodynamics and phase transitions of a 4-dimensional rotating Kaluza-Klein black hole solution in the presence of Maxwell electrodynamics. Calculat…
Critical Phenomena and Reentrant Phase Transition of Asymptotically Reissner-Nordstrom Black Holes
Mehrab Momennia, Seyed Hossein Hendi
By considering a small correction to the Maxwell field, we show that the resultant black hole solutions (also known as the asymptotically Reissner--Nordström black holes) undergo t…
Quasinormal modes of black holes in Weyl gravity: Electromagnetic and gravitational perturbations
Mehrab Momennia, Seyed Hossein Hendi
The recent reported gravitational wave detection motivates one to investigate the properties of different black hole models, especially their behavior under (axial) gravitational p…
Near-extremal black holes in Weyl gravity: Quasinormal modes and geodesic instability
Mehrab Momennia, Seyed Hossein Hendi
Stability criteria of nearly extreme black holes in the perturbations level is one of the interesting issues in gravitational systems. Considering the nearly extreme conformal-de S…
Stability and Quasinormal Modes of Black Holes in Conformal Weyl Gravity
Mehrab Momennia, Seyed Hossein Hendi, Fatemeh Soltani Bidgoli
In this paper, we first investigate the thermal stability of black holes in conformal Weyl gravity with a comparison with the Schwarzschild black holes. Then, we consider a minimal…
Thermodynamic description and quasinormal modes of adS black holes in Born-Infeld massive gravity with a non-abelian hair
Seyed Hossein Hendi, Mehrab Momennia
We construct a new class of asymptotically (a)dS black hole solutions of Einstein-Yang-Mills massive gravity in the presence of Born-Infeld nonlinear electrodynamics. The obtained…
Magnetic solutions in Einstein-massive gravity with linear and nonlinear fields
Seyed Hossein Hendi, Behzad Eslam Panah, Shahram Panahiyan +1
The solutions of gauge-gravity coupling is one of the interesting models for analyzing the semi-classical nature of spacetime. In this regard, different well-known singular…
Dilatonic black holes in gravity's rainbow with a nonlinear source: the effects of thermal fluctuations
S. H. Hendi, B. Eslam Panah, S. Panahiyan +1
This paper is devoted to investigate nonlinearly charged dilatonic black holes in the context of gravity's rainbow with two cases: I) by considering the usual entropy, II) in the p…
Reentrant phase transition of Born-Infeld-dilaton black holes
Seyed Hossein Hendi, Mehrab Momennia
We explore a novel reentrant phase transition of four-dimensional Born-Infeld-dilaton black hole in which the first order phase transition modify into a zeroth order phase transiti…
Nonsingular universe in massive gravity's rainbow
Seyed Hossein Hendi, Mehrab Momennia, Behzad Eslam Panah +1
One of the fundamental open questions in cosmology is whether we can regard the universe evolution without singularity like a Big Bang or a Big Rip. This challenging subject stimul…