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
15 papers · 1 filter
On the stability of the orthogonal Pexiderized Cauchy equation
Mohammad Sal Moslehian
We investigate the stability of Pexiderized mappings in Banach modules over a unital Banach algebra. As a consequence, we establish the Hyers--Ulam stability of the orthogonal Cauc…
On the Orthogonal Stability of the Pexiderized Quadratic Equation
Mohammad Sal Moslehian
The Hyers--Ulam stability of the conditional quadratic functional equation of Pexider type f(x+y)+f(x-y)=2g(x)+2h(y), x\perp y is established where \perp is a symmetric orthogonali…
Constraints on Dirac-Born-Infeld type dark energy models from varying alpha
Mohammad R. Garousi, M. Sami, Shinji Tsujikawa
We study the variation of the effective fine structure constant alpha for Dirac-Born-Infeld (DBI) type dark energy models. The DBI action based on string theory naturally gives ris…
Gravitational collapse of polytropic, magnetized, filamentary clouds
Mohsen Shadmehri
When the gas of a magnetized filamentary cloud obeys a polytropic equation of state, gravitational collapse of the cloud is studied using a simplified model. We concentrate on the…
D-brane anti-D-brane effective action and brane interaction in open string channel
Mohammad R. Garousi
We construct the effective action of a -brane-anti--brane system by making use of the non-abelian extension of tachyonic DBI action. We succeed the construction by restri…
What is needed of a tachyon if it is to be the dark energy?
Edmund J. Copeland, Mohammad R. Garousi, M. Sami +1
We study a dark energy scenario in the presence of a tachyon field with potential and a barotropic perfect fluid. The cosmological dynamics crucially depends on the asym…
The Lifetimes and Evolution of Molecular Cloud Cores
Enrique Vazquez-Semadeni, Jongsoo Kim, Mohsen Shadmehri +1
We discuss the lifetimes and evolution of clumps and cores formed as turbulent density fluctuations in nearly isothermal molecular clouds. In the non-magnetic case, clumps are unli…
Closed String S-matrix Elements in Open String Field Theory
Mohammad R. Garousi, G. R. Maktabdaran
We study the S-matrix elements of the gauge invariant operators corresponding to on-shell closed strings, in open string field theory. In particular, we calculate the tree level S-…
Generalized Induced Norms
S. Hejazian, M. Mirzavaziri, M. S. Moslehian
Let ||.|| be a norm on the algebra M_n of all n-by-n matrices over the complex field C. An interesting problem in matrix theory is that "are there two norms ||.||_1 and ||.||_2 on…
Variability in the stellar initial mass function at high mass: coalescence models for starburst clusters
Mohsen Shadmehri
A coalescence model using the observed properties of pre-stellar condensations (PSCs) shows how an initially steep IMF that might be characteristic of primordial cloud fragmentatio…
Generation of electromagnetic fields in string cosmology with a massive scalar field on the anti D-brane
Mohammad R. Garousi, M. Sami, Shinji Tsujikawa
We study the generation of electromagnetic fields in a string-inspired scenario associated with a rolling massive scalar field on the anti-D3 branes of KKLT de Sitter vacua. Th…
The Lifetimes of Molecular Cloud Cores: What is the Role of the Magnetic Field?
E. Vazquez-Semadeni, J. Kim, M. Shadmehri +1
We discuss the lifetimes and evolution of dense cores formed as turbulent density fluctuations in magnetized, isothermal molecular clouds. We consider numerical simulations in whic…
Equilibria of a Self-Gravitating, Rotating Disk Around a Magnetized Compact Object
J. Ghanbari, S. Abbassi
We examine the effect of self-gravity in a rotating thick-disk equilibrium in the presence of a dipolar magnetic field. In the first part, we find a self-similar solution for non-s…
Cosmology from Rolling Massive Scalar Field on the anti-D3 Brane of de Sitter Vacua
Mohammad R. Garousi, M. Sami, Shinji Tsujikawa
We investigate a string-inspired scenario associated with a rolling massive scalar field on D-branes and discuss its cosmological implications. In particular, we discuss cosmologic…
Time-dependent evolution of quasi-spherical, self-gravitating accretion flow
Mohsen Shadmehri
A self-similar solution for time evolution of quasi-spherical, self-gravitating accretion flows is obtained under the assumption that the generated heat by viscosity is retained in…