268 citations · 6.5k across the 138 of their papers we have counts for
7 papers · 1 filter
Dark Energy Models With Variable Equation Of State Parameter
Utpal Mukhopadhyay, Saibal Ray, Farook Rahaman
Two variable models, viz. and have been studied under the assumption that the equation of state parameter is a function of time. The selected…
Phenomenology of -CDM model: a possibility of accelerating Universe with positive pressure
Saibal Ray, Maxim Khlopov, Utpal Mukhopadhyay +1
Among various phenomenological models, a time-dependent model is selected here to investigate the -CDM cosmology. Using this model the expressions for the t…
Scenario of inflationary cosmology from the phenomenological models
Saibal Ray, P. C. Ray, Partha Pratim Ghosh +2
Choosing the three phenomenological models of the dynamical cosmological term , viz., , and where is the cosmic scale facto…
Do Solar system tests permit higher dimensional general relativity?
F. Rahaman, Saibal Ray, M. Kalam +1
We perform a survey whether higher dimensional Schwarzschild space-time is compatible with some of the solar system phenomena. As a test we examine five well known solar system eff…
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…