112 citations · 377 across the 10 of their papers we have counts for
10 papers
Regularized Stable Kerr Black Hole: Cosmic Censorships, Shadow and Quasi-Normal Modes
Rajes Ghosh, Mostafizur Rahman, Akash K Mishra
Black hole solutions in general relativity come with pathologies such as singularity and mass inflation instability, which are believed to be cured by a yet-to-be-found quantum the…
Overcharging Extremal Black Holes
Rajes Ghosh, Akash K Mishra, Sudipta Sarkar
The Weak Cosmic Censorship (WCC) conjecture can be used as a consistency criterion for any viable modification over general relativity (GR). We employ this idea to show that in con…
Constraining extra dimensions using observations of black hole quasi-normal modes
Akash K Mishra, Abhirup Ghosh, Sumanta Chakraborty
The presence of extra dimensions generically modify the spacetime geometry of a rotating black hole, by adding an additional hair, besides the mass and the angular momentum …
Quasinormal modes and Strong Cosmic Censorship in the regularised 4D Einstein-Gauss-Bonnet gravity
Akash K Mishra
The fate of strong cosmic censorship is ultimately linked to the extendibility of perturbation across the Cauchy Horizon and known to be violated in the near extremal region of a c…
Strong Cosmic Censorship in higher curvature gravity
Akash K Mishra, Sumanta Chakraborty
Deterministic nature of general relativity is ensured by the strong cosmic censorship conjecture, which asserts that spacetime cannot be extended beyond Cauchy horizon with square…
Constraints on higher curvature gravity from time delay between GW170817 and GRB 170817A
Avirup Ghosh, Soumya Jana, Akash K Mishra +1
General relativity may be an effective theory with higher curvature correction terms in the action. Inclusion of these terms leads to exciting new possibilities, e.g., gravitationa…
Overcharging a multi black hole system and cosmic censorship
Akash K Mishra, Sudipta Sarkar
We study the generalization of the gadenken experiment of overcharging an extremal black hole proposed by Wald in the context of a multi black hole solution. In particular, we atte…
Understanding photon sphere and black hole shadow in dynamically evolving spacetimes
Akash K Mishra, Sumanta Chakraborty, Sudipta Sarkar
We have derived the differential equation governing the evolution of the photon sphere for dynamical black hole spacetimes with or without spherical symmetry. Numerical solution of…
Black Hole Topology in Gravity
Akash K Mishra, Mostafizur Rahman, Sudipta Sarkar
Hawking's topology theorem in general relativity restricts the cross-section of the event horizon of a black hole in dimension to be either spherical or toroidal. The toroida…
On the physical process first law for dynamical black holes
Akash Mishra, Sumanta Chakraborty, Avirup Ghosh +1
Physical process version of the first law of black hole mechanics relates the change in entropy of a perturbed Killing horizon, between two asymptotic cross sections, to the matter…