268 citations · 6.5k across the 138 of their papers we have counts for
10 papers · 1 filter
Galactic rotation curves and brane world models
F. Rahaman, M. Kalam, A. DeBenedictis +2
In the present investigation flat rotational curves of the galaxies are considered under the framework of brane-world models where the 4d effective Einstein equation has extra term…
Periodicity of ~155 days in solar electron fluence
Partha Chowdhury, P. C. Ray, Saibal Ray
In this paper we have investigated the occurrence rate of high energetic(E>10 MeV) solar electron flares measured by IMP-8 spacecraft of NASA for solar cycle 21 (June, 1976 to Augu…
Physical properties of Tolman-Bayin solutions: some cases of static charged fluid spheres in general relativity
Saibal Ray, Basanti Das, Farook Rahaman +1
In this article, Einstein-Maxwell space-time has been considered in connection to some of the astrophysical solutions as previously obtained by Tolman (1939) and Bayin (1978). The…
Scenarios of cosmic string with variable cosmological constant
Saibal Ray, Farook Rahaman, Utpal Mukhopadhyay
Exact solutions of the Einstein field equations with cosmic string and space varying cosmological constant, viz., , in the energy-momentum tensors are presented. Three cas…
The Dynamic Cosmological Term : Some Aspects of Phenomenological Models
Utpal Mukhopadhyay, Saibal Ray
Choosing a phenomenological model of , viz. , it has been shown that this model of is equivalent to other three types of , , $Λ\sim \ddo…
Dark energy with polytropic equation of state
Utpal Mukhopadhyay, Saibal Ray
Equation of state parameter plays a significant role for guessing the real nature of dark energy. In the present paper polytropic equation of state is chosen for some of t…