72 citations · 628 across the 49 of their papers we have counts for
5 papers · 1 filter
Kerr-de Sitter spacetime, Penrose process and the generalized area theorem
Sourav Bhattacharya
We investigate various aspects of energy extraction via the Penrose process in the Kerr-de Sitter spacetime. We show that the increase in the value of a positive cosmological const…
Constraining phantom braneworld model from cosmic structure sizes
Sourav Bhattacharya, Stefanos R Kousvos
We consider the phantom braneworld model in the context of the maximum turn around radius, , of a stable, spherical cosmic structure with a given mass. The maximum…
Light bending, static dark energy and related uniqueness of Schwarzschild-de Sitter spacetime
Md Sabir Ali, Sourav Bhattacharya
Since the Schwarzschild-de Sitter spacetime is static inside the cosmological event horizon, if the dark energy state parameter is sufficiently close to , apparently one could…
Cosmic structure sizes in generic dark energy models
Sourav Bhattacharya, Theodore N Tomaras
The maximum allowable size of a spherical cosmic structure as a function of its mass is determined by the maximum turn around radius , the distance from its centre…
Entropy of a box of gas in an external gravitational field revisited
Sourav Bhattacharya, Sumanta Chakraborty, T. Padmanabhan
Earlier it was shown that the entropy of an ideal gas, contained in a box and moving in a gravitational field, develops an area dependence when it approaches the horizon of a stati…