127 citations · 275 across the 8 of their papers we have counts for
8 papers
Dynamical age of the universe as a constraint on the parametrization of dark energy equation of state
Vinod B. Johri, P. K. Rath
The dynamical age of the universe depends upon the rate of the expansion of the universe, which explicitly involves the dark energy equation of state parameter . Consequently…
Parametrization of dark energy equation of state Revisited
Vinod B. Johri, P. K. Rath
A comparative study of various parametrizations of the dark energy equation of state is made. Astrophysical constraints from LSS, CMB and BBN are laid down to test the physical via…
Parametrization of Dark Energy Equation of State
Vinod B. Johri
A comparative study of various parametrizations of the dark energy equation of state and its variation with the redshift is made. Astrophysical constraints from 'integrated…
Phantom Cosmologies
Vinod B. Johri
The dynamics of a minimally coupled scalar field in the expanding universe is discussed with special reference to phantom cosmology. The evolution of the universe with a phantom fi…
Search for Tracker Potentials in Quintessence Theory
Vinod B. Johri
We report a significant finding in Quintessence theory that the the scalar fields with tracker potentials have a model-independent scaling behaviour in the expanding universe. So f…
Phenomemology of a Realistic Accelerating Universe Using Tracker Fields
Vinod B. Johri
We present a realistic scenario of tracking of scalar fields with varying equation of state. The astrophysical constraints on the evolution of scalar fields in the physical univers…