3 citations · 3 across the 1 of their papers we have counts for
5 papers
Testing the Weak Equivalence Principle near black holes
Rittick Roy, Askar B. Abdikamalov, Dimitry Ayzenberg +3
Today we have quite stringent constraints on possible violations of the Weak Equivalence Principle from the comparison of the acceleration of test-bodies of different composition i…
Quasinormal modes and greybody factors of the novel four dimensional Gauss-Bonnet black holes in asymptotically de Sitter space time: Scalar, Electromagnetic and Dirac perturbations
Saraswati Devi, Rittick Roy, Sayan Chakrabarti
We find the low lying quasinormal mode frequencies of the recently proposed novel four dimensional Gauss-Bonnet de Sitter black holes for scalar, electromagnetic and Dirac field pe…
A study on black hole shadows in asymptotically de Sitter spacetimes
Rittick Roy, Sayan Chakrabarti
Previous works on black hole shadows have been primarily focused on studying shadows in asymptotically flat and anti-de Sitter space times. In the present work, we find general exp…
Mode stability of a near-extremal Kerr superspinar
Rittick Roy, Prashant Kocherlakota, Pankaj S. Joshi
We study here the quasi-normal mode stability of a near-extremal Kerr superspinar, an exotic spinning compact object that exceeds the Kerr bound, under gravitational perturbations.…
Evolution of black hole shadow in the presence of ultralight bosons
Rittick Roy, Urjit A. Yajnik
Kerr black holes coupled to quantized bosonic fields display a special version of the Hawking effect, governed by the superradiance condition. This leads to rapid growth of boson c…