98 citations · 693 across the 35 of their papers we have counts for
3 papers · 1 filter
Self-gravitating fluid systems and galactic dark matter
Uddipan Banik, Dipanjan Dey, Kaushik Bhattacharya +1
We study gravitational collapse with anisotropic pressures, whose end stage can mimic space-times that are seeded by galactic dark matter. To this end, we identify a class of space…
Astrophysics of Bertrand Space-times
Dipanjan Dey, Kaushik Bhattacharya, Tapobrata Sarkar
We construct a model for galactic dark matter that arises as a solution of Einstein gravity, and is a Bertrand space-time matched with an external Schwarzschild metric. This model…
Galactic Dark Matter and Bertrand Space-times
Dipanjan Dey, Kaushik Bhattacharya, Tapobrata Sarkar
Bertrand space-times (BSTs) are static, spherically symmetric solutions of Einstein's equations, that admit stable, closed orbits. Starting from the fact that to a good approximati…