98 citations · 241 across the 12 of their papers we have counts for
5 papers · 1 filter
On viability of isentropic perfect fluid collapse with a linear equation of state
Karim Mosani, Dipanjan Dey, Pankaj S. Joshi
The gravitational collapse of a barotropic perfect fluid having the Equation of State (EoS) , where is constant, is studied here in the framework of general relativity. W…
Timelike Geodesics in Naked Singularity and Black Hole Spacetimes II
Ashok B. Joshi, Parth Bambhaniya, Dipanjan Dey +1
We derive here the orbit equations of particles in naked singularity spacetimes, namely the Bertrand (BST) and Janis-Newman-Winicour (JNW) geometries, and for the Schwarzschild bla…
Timelike geodesics in Naked Singularity and Black Hole Spacetimes
Parth Bambhaniya, Ashok B. Joshi, Dipanjan Dey +1
In this paper, we derive the solutions of orbit equations for a class of naked singularity spacetimes, and compare these with timelike orbits, that is, particle trajectories in the…
A General Relativistic Approach to Small-Scale Structure Formation
Dipanjan Dey, Prashant Kocherlakota, Pankaj S. Joshi
We treat here general relativistically the issue of galaxy formation, which is a major problem in cosmology. While the current models use a top-hat collapse model, coupled with New…
Gravitational Collapse of Baryonic and Dark matter
Dipanjan Dey, Pankaj S. Joshi
A massive star undergoes a continual gravitational collapse when the pressures inside the collapsing star become insufficient to balance the pull of gravity. The Physics of gravita…