6 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…
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…
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…
The Buchdahl Bound Denotes The Geometrical Virial Theorem
Naresh Dadhich, Rituparno Goswami, Chevarra Hansraj
In this paper, we geometrically establish yet another correspondence between Newtonian mechanics and general relativity by connecting the Buchdahl bound and the Virial theorem. Buc…
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…