18 citations · 77 across the 14 of their papers we have counts for
14 papers
Probing the spin of compact objects with gravitational microlensing of gravitational waves
Gopalkrishna Prabhu, Uddeepta Deka, Sumanta Chakraborty +1
Propagating gravitational waves (GWs) can encounter a massive object (lens) whose gravitational radius is comparable to the wavelength of the GWs (wave-optics regime). The resultin…
Probing the existence of a minimal length through compact binary inspiral
N. V. Krishnendu, Aldo Perri, Sumanta Chakraborty +1
Existence of a minimal length in spacetime geometries avoids several singular situations involving quantum theory and gravity. In this work, we show that the existence of such a mi…
Extreme mass ratio inspirals in rotating dark matter spikes
Soumodeep Mitra, Nicholas Speeney, Sumanta Chakraborty +1
Gravitational wave (GW) signals from extreme mass ratio inspirals (EMRIs) are a key observational target for the Laser Interferometer Space Antenna (LISA). The waveforms may be aff…
Gravitational physics in the context of Indian astronomy: A vision document
P. Ajith, K. G. Arun, Sukanta Bose +13
Contributions from the Indian gravity community have played a significant role in shaping several branches of astronomy and astrophysics. This document reviews some of the most imp…
Response of a Kerr black hole to a generic tidal perturbation
Rajendra Prasad Bhatt, Sumanta Chakraborty, Sukanta Bose
We derive the response, the real part of which provides the tidal Love numbers, for non-extremal as well as extremal Kerr black holes under generic tidal perturbations. Our results…
Tidal Love numbers and quasi-normal modes of the Schwarzschild-Hernquist black hole
Sumanta Chakraborty, Geoffrey Compère, Ludovico Machet
We derive the model of the Schwarzschild black hole immersed into a dark matter halo with a relativistic Hernquist profile, the Schwarzschild-Hernquist black hole, and obtain its t…
Scalar-tensor theories of gravity from a thermodynamic viewpoint
Krishnakanta Bhattacharya, Sumanta Chakraborty
In any diffeomorphism invariant theory of gravity, one can define a Noether charge arising from the invariance of the Lagrangian under diffeomorphisms. We have determined the Noeth…
On supertranslation invariant Lorentz charges
Sumanta Chakraborty, Sk Jahanur Hoque, Amitabh Virmani
In recent papers, Fuentealba, Henneaux, and Troessaert (FHT) gave definitions for supertranslation invariant Lorentz charges in the ADM Hamiltonian formalism and showed that their…
Rotating black holes experience dynamical tides
Rajendra Prasad Bhatt, Sumanta Chakraborty, Sukanta Bose
We find the dynamical tidal response of a Kerr black hole (BH) and demonstrate its tidal Love numbers to be non-vanishing when present in a non-axisymmetric external tidal field. T…
Probing black hole `charge' from the binary black hole inspiral
N. V. Krishnendu, Sumanta Chakraborty
Recent gravitational wave (GW) observations have enabled us to look beyond the standard paradigm of gravitational physics, namely general relativity (GR). Along with the mass and t…
Probing charge of compact objects with gravitational microlensing of gravitational waves
Uddeepta Deka, Sumanta Chakraborty, Shasvath J. Kapadia +2
Gravitational microlensing of gravitational waves (GWs) opens up the exciting possibility of studying the spacetime geometry around the lens. In this work, we investigate the prosp…
Singularity avoidance from path integral
Ribhu Paul, Sumanta Chakraborty
We have demonstrated that the wave functional describing the quantum nature of the spacetime inside the black hole horizon, vanishes near the singularity, using the path integral f…
Probing the quantum nature of black holes with ultra-light boson environments
Soumodeep Mitra, Sumanta Chakraborty, Rodrigo Vicente +1
Quantum black holes (BHs), thought of as an excited multilevel system, can be effectively modelled by replacing an event horizon with a partially reflective membrane. This emergent…
Bounds on tidal charges from gravitational-wave ringdown observations
Akash K Mishra, Gregorio Carullo, Sumanta Chakraborty
Black hole solutions in the braneworld scenario are predicted to possess a tidal charge parameter, leaving imprints in the quasinormal spectrum. We conduct an extensive computation…