668 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Institute for Research in Fundamental SciencesIR108 papers
- Damghan UniversityIR31 papers
- Islamic Azad University, MashhadIR13 papers
- K. N. Toosi University of TechnologyIR13 papers
- Farhangian UniversityIR12 papers
- Shahid Beheshti UniversityIR11 papers
- University of TehranIR11 papers
- Dublin City UniversityIE10 papers
- Golestan UniversityIR10 papers
- Centre National de la Recherche ScientifiqueFR9 papers
- Deakin UniversityAU9 papers
- Institute of Metal Superplasticity ProblemsRU9 papers
30 papers · 1 filter
On the Nonlocal Newtonian Cosmology
Raihaneh Moti
In the absence of an exact development of the cosmological models based on the Mashhoon nonlocal gravity, the Newtonian regime clarifies some aspects of it. To improve this model m…
Relativistic binary systems in scale-independent energy-momentum squared gravity
Ozgur Akarsu, Elham Nazari, Mahmood Roshan
In this paper, we study the gravitational-wave (GW) radiation and radiative behavior of relativistic binary systems in the scale-independent energy-momentum squared gravity (EMSG).…
Thick branes via higher order field theory models with exponential and power-law tails
Marzieh Peyravi, Samira Nazifkar, Francisco S. N. Lobo +1
In this work, we obtain exact thick brane models in dimensions generated by higher order field theory kinks, inspired by specific potentials for and models.…
Nonlocal Gravity: Modification of Newtonian Gravitational Force in the Solar System
Mahmood Roshan, Bahram Mashhoon
Nonlocal gravity (NLG) is a classical nonlocal generalization of Einstein's theory of gravitation developed in close analogy with the nonlocal electrodynamics of media. It appears…
Light bending and gravitational lensing in energy-momentum-squared gravity
Elham Nazari
In the present work, we derive the motion of light in the weak-field limit of energy-momentum-squared gravity (EMSG). To do so, we introduce the post-Newtonian (PN) expansion of th…
Cosmological Dynamics of Relativistic MOND
Tahere Kashfi, Mahmood Roshan
In this paper, we investigate the recently proposed relativistic theory for MOND using the phase space analysis. Unlike its precedent theory, namely TeVeS, this theory is claimed t…
Constraining Energy-Momentum-Squared Gravity by binary pulsar observations
Elham Nazari, Mahmood Roshan, Ivan De Martino
In this paper, we introduce the post-Minkowskian approximation of Energy-Momentum-Squared Gravity (EMSG). This approximation is used to study the gravitational energy flux in the c…
On the quantum gravastar
Raihaneh Moti, Ali Shojai
In this paper, we show that it is possible to have pure quantum gravastar solution to the quantum improved Einstein equations. Such an object is essentially a gravastar in which th…
Dynamical Friction in Nonlocal Gravity
Mahmood Roshan, Bahram Mashhoon
We study dynamical friction in the Newtonian regime of nonlocal gravity (NLG), which is a classical nonlocal generalization of Einstein's theory of gravitation. The nonlocal aspect…
Relativistic Tidal Accelerations in the Exterior Schwarzschild Spacetime
Mahmood Roshan, Bahram Mashhoon
We study further a general relativistic mechanism for the acquisition of tidal energy by free test particles near a gravitationally collapsed configuration. Specifically, we invest…
Generalized Energy-Momentum-Squared Gravity in the Palatini Formalism
Elham Nazari, Farahnaz Sarvi, Mahmood Roshan
We study the generalized version of energy-momentum squared gravity (EMSG) in the Palatini formalism. This theory allows the existence of a scalar constructed with energy-momentum…
Quasilocal conservation laws in cosmology: a first look
Marius Oltean, Hossein Bazrafshan Moghaddam, Richard J. Epp
Quasilocal definitions of stress-energy-momentum---that is, in the form of boundary densities (in lieu of local volume densities)---have proven generally very useful in formulating…
Energy of cosmological spacetimes and perturbations: a quasilocal approach
Marius Oltean, Hossein Bazrafshan Moghaddam, Richard J. Epp
Quasilocal definitions of stress-energy-momentum -- that is, in the form of boundary densities (rather than local volume densities) -- have proven generally very useful in formulat…
Novel thick brane solutions with symmetry breaking
Marzieh Peyravi, Nematollah Riazi, Francisco S. N. Lobo
In this work, using two scalar fields (, ) coupled to 4+1 dimensional gravity, we construct novel topological brane solutions through an explicit symmetry breaking ter…
Jeans analysis in energy-momentum-squared gravity
Ali Kazemi, Mahmood Roshan, Ivan De Martino +1
In this paper, we study the Jeans analysis in the context of energy-momentum-squared gravity (EMSG). More specifically we find the new Jeans mass for non-rotating infinite mediums…
Evolution of spiral galaxies in nonlocal gravity
Mahmood Roshan, Sohrab Rahvar
We study the evolution of simulated disk galaxies in the context of a nonlocal theory of gravity. In this theory the appearance of the dark matter problem in cosmology and astrophy…
Linear cosmological perturbations in Scalar-tensor-vector gravity
Sara Jamali, Mahmood Roshan, Luca Amendola
We investigate the cosmological perturbations in the context of a Scalar-Tensor-Vector theory of Gravity known as MOG in the literature. Recent investigations show that MOG reprodu…
A Modified Dynamical Model of Cosmology I. Theory
Hossein Shenavar, Kurosh Javidan
Wheeler (1964) had formulated Mach's principle as the boundary condition for general relativistic field equations. Here, we use this idea and develop a modified dynamical model of…
Observational assessment of the viability of de Sitter-Gödel-de Sitter phase transition
Sh. Khodabakhshi, M. Farhang, A. Shojai +2
de Sitter--Gödel--de Sitter phase transition(dGd) is a possible geometrical phase transition in the very early universe. It induces fluctuations with possibly observable traces on…
Post-Newtonian magnetohydrodynamics
Elham Nazari, Mahmood Roshan
In this paper, we derive the post-Newtonian equations of the ideal Magnetohydrodynamics. To do so, we use the modern approach to post-Newtonian theory, where the harmonic gauge is…
Compact stars in Energy-Momentum Squared Gravity
Nasrin Nari, Mahmood Roshan
A simple generalization to Einstein's general relativity (GR) was recently proposed which allows a correction term in the action functional of the theory. This theor…
On the cosmology of scalar-tensor-vector gravity theory
Sara Jamali, Mahmood Roshan, Luca Amendola
We consider the cosmological consequences of a special scalar-tensor-vector theory of gravity, known as MOG (for MOdified Gravity), proposed to address the dark matter problem. Thi…
The phase space analysis of modified gravity (MOG)
Sara Jamali, Mahmood Roshan
We investigate the cosmological consequences of a scalar-vector-tensor theory of gravity known as MOG. In MOG, in addition to metric tensor, there are two scalar fields and…
Energy-Momentum Squared Gravity
Mahmood Roshan, Fatimah Shojai
A new covariant generalization of Einstein's general relativity is developed which allows the existence of a term proportional to in the action functional of the the…