203 citations · 3.4k across the 107 of their papers we have counts for
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Eddington gravity with matter: An emergent perspective
Sumanta Chakraborty, T. Padmanabhan
We describe an action principle, within the framework of the Eddington gravity, which incorporates the matter fields in a simple manner. Interestingly, the gravitational field equa…
Perturbations of the almost Killing equation and their implications
Sumanta Chakraborty, Justin C. Feng
Killing vectors play a crucial role in characterizing the symmetries of a given spacetime. However, realistic astrophysical systems are in most cases only approximately symmetric.…
Ergoregion instability and echoes for braneworld black holes: Scalar, electromagnetic and gravitational perturbations
Ramit Dey, Shauvik Biswas, Sumanta Chakraborty
In the context of higher dimensional braneworld scenario, we have argued that the occurrence of horizonless exotic compact objects, as an alternative to classical black holes, are…
Multipole moments of compact objects with NUT charge: Theoretical and observational implications
Sajal Mukherjee, Sumanta Chakraborty
We derive the multipole moments of the Kerr-NUT black hole spacetime using the Geroch-Hansen formalism, even though the spacetime is not asymptotically flat. Intriguingly, in the p…
Limits on stellar structures in Lovelock theories of gravity
Sumanta Chakraborty, Naresh Dadhich
We study the bound on the compactness of a stellar object in pure Lovelock theories of arbitrary order in arbitrary spacetime dimensions, involving electromagnetic field. The bound…
First law of black hole mechanics with fermions
P. B. Aneesh, Sumanta Chakraborty, Sk Jahanur Hoque +1
In the last few years, there has been significant interest in understanding the stationary comparison version of the first law of black hole mechanics in the vielbein formulation o…
Softly broken conformal symmetry with higher curvature terms
Sumanta Chakraborty
In a scalar-coupled-gravity model, the quadratically divergent counter term appearing in the mass renormalization of the scalar fields must inherit corrections arising out of gravi…
Non-trivial time crystal-like ground state for gravitational perturbation in quadratic gravity
Sumanta Chakraborty, Subir Ghosh
We consider gravitational perturbation around maximally symmetric background of a theory of gravity involving quadratic curvature correction. This leads to a decoupled model of the…
Echoes from the braneworld black holes
Ramit Dey, Sumanta Chakraborty, Niayesh Afshordi
The holographic interpretation of the Randall-Sundrum model based on the adaptation of the AdS/CFT correspondence to the braneworld scenario states that the black holes localized o…
Strong cosmic censorship conjecture with NUT charge and conformal coupling
Mostafizur Rahman, Soumodeep Mitra, Sumanta Chakraborty
Strong cosmic censorship conjecture is central to the deterministic nature of general relativity, since it asserts that given any generic initial data on a spacelike hypersurface,…