339 citations · 4.5k across the 182 of their papers we have counts for
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Observational Constraints on a Variable Dark Energy Model
M. Sadegh Movahed, Sohrab Rahvar
We study the effect of a phenomenological parameterized quintessence model on low, intermediate and high redshift observations. At low and intermediate redshifts, we use the Gold s…
Gravitational Microlensing by Rotating Stars
Habib Ebrahimnejad Rahbari, Mohammad Nouri-Zonoz, Sohrab Rahvar
Using the astrometry of microlensing events we study the effect of angular momentum as compared to that of the parallax. For a rotating lens it is shown that the effect of the angu…
The Effect of Uncertainty Principle on the Thermodynamics of Early Universe
S. Rahvar, M. Sadegh Movahed, M Saadat
We discuss the concept of measurement in cosmology from the relativistic and quantum mechanical points of view. The uncertainty principle within the particle horizon, excludes the…
Multifractal Detrended Fluctuation Analysis of Sunspot Time Series
M. Sadegh Movahed, G. R. Jafari, F. Ghasemi +2
We use multifractal detrended fluctuation analysis (MF-DFA), to See query 1 study sunspot number fluctuations. The result of the MF-DFA shows that there are three crossover timesca…
A Parameterized Variable Dark Energy Model: Structure Formation and Observational Constraints
Sepehr Arbabi Bidgoli, M. Sadegh Movahed, Sohrab Rahvar
In this paper we investigate a simple parameterization scheme of the quintessence model given by Wetterich (2004). The crucial parameter of this model is the bending parameter ,…
Magellanic Stream: A Possible Tool for Studying Dark Halo Model
Hosein Haghi, Akram Hasani Zonoozi, Sohrab Rahvar
We model the dynamics of Magellanic Stream with the ram-pressure scenario in the logarithmic and power-law galactic halo models and construct numerically the past orbital history o…