112 citations · 635 across the 23 of their papers we have counts for
9 papers · 1 filter
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…
Silhouette of M87*: A new window to peek into the world of hidden dimensions
Indrani Banerjee, Sumanta Chakraborty, Soumitra SenGupta
The recent observation of the shadow of the supermassive black hole M87*, located at the centre of the M87 galaxy, by the Event Horizon Telescope collaboration has opened up a new…
Boundary Term in the Gravitational Action is the Heat Content of the Null surfaces
Sumanta Chakraborty, T. Padmanabhan
The Einstein-Hilbert Lagrangian has no well-defined variational derivative with respect to the metric. This issue has to be tackled by adding a suitable surface term to the action,…
Embedding into flat spacetime and black hole thermodynamics
T. R. Govindarajan, Sumanta Chakraborty
It is known that static and spherically symmetric black hole solutions of general relativity in different spacetimes can be embedded into higher dimensional flat spacetime. Given t…
Decoding signatures of extra dimensions and estimating spin of quasars from the continuum spectrum
Indrani Banerjee, Sumanta Chakraborty, Soumitra SenGupta
Continuum spectrum emitted by the accretion disk around quasars hold a wealth of information regarding the strong gravitational field produced by the massive central object. Such s…
Generalized Schwinger effect and particle production in an expanding universe
Karthik Rajeev, Sumanta Chakraborty, T. Padmanabhan
We discuss several aspects of particle production in: (a) time dependent electric field and (b) expanding Friedmann background. In the first part of the paper, we provide an algebr…