190 citations · 2.2k across the 86 of their papers we have counts for
88 papers
Universality and Criticality in Mass-less Scalar Field Collapse
Koushiki, Rituparno Goswami, Pankaj S. Joshi
In this paper, we observe the collapse of a mass-less scalar field covariantly. We show that the strengths of the collapsing and dispersing modes of this scalar field will decide w…
Accreting Black Holes radiate classical Vaidya radiation to pave way for Hawking radiation
Naresh Dadhich, Rituparno Goswami
It is well known that locally defined marginally outer trapped surface (MOTS) is null and coincident with the event horizon of an unperturbed static Schwarzschild black hole. This…
A dynamical systems formulation for inhomogeneous LRS-II spacetimes
Saikat Chakraborty, Peter K. S. Dunsby, Rituparno Goswami +1
We present a dynamical system formulation for inhomogeneous LRS-II spacetimes using the covariant 1+1+2 decomposition approach. Our approach describes the LRS-II dynamics from the…
Arrow of time and gravitational entropy in collapse
Samarjit Chakraborty, Sunil D. Maharaj, Sarbari Guha +1
We investigate the status of the gravitational arrow of time in the case of a spherical collapse of a fluid that conducts heat and radiates energy. In particular, we examine the re…
Transient electromagnetic sources can detect solitary black holes in Milky Way galaxy
Susmita Jana, Rituparno Goswami, S. Shankaranarayanan +1
The Milky Way galaxy is estimated to host up to a billion stellar-mass solitary black holes (BHs). The number and distribution of BH masses can provide crucial information about th…
What makes a shear-free spherical perfect fluid be inhomogeneous with tidal effects?
Jonathan Hakata, Rituparno Goswami, Chevarra Hansraj +1
This is an important and natural question as the spacetime shear, inhomogeneity and tidal effects are all intertwined via the Einstein field equations. However, as we show in this…