401 citations · 1.2k across the 20 of their papers we have counts for
21 papers
Learning Inspiral-Merger-Ringdown Waveforms from a Post-Newtonian Baseline
Arghya Chattopadhyay, Shilpa Kastha
Modeling the full inspiral-merger-ringdown signal requires combining analytically controlled inspiral physics with the nonlinear strong-field information supplied by numerical rela…
Cusp Formation in Merging Black Hole Horizons
Shilpa Kastha, Stamatis Vretinaris, Daniel Pook-Kolb +1
An important question in binary black hole mergers is to connect properties of the remnant black hole to those of the two initial black holes. These properties include not only the…
On the physical significance of black hole quasinormal mode spectra instability
Vitor Cardoso, Shilpa Kastha, Rodrigo Panosso Macedo
It has been shown, via specific examples and a pseudospectrum analysis, that the black hole quasinormal spectra are unstable. The implication of such a result for gravitational-wav…
Constraining parametric deviations from the Kerr spacetime using black hole ringdowns of GW150914 and GW190521
Zaryab Ahmed, Shilpa Kastha, Alex B. Nielsen
The ringdown phase of a binary black hole merger is modelled by the quasi-normal modes of a perturbed Kerr black hole. According to the black hole no-hair theorem, the emitted ring…
Multiparameter multipolar test of general relativity with gravitational waves
Parthapratim Mahapatra, Shilpa Kastha, Anuradha Gupta +2
Amplitude and phase of the gravitational waveform from compact binary systems can be decomposed in terms of their mass- and current-type multipole moments. In a modified theory of…
Parametrized multipolar gravitational waveforms for testing general relativity: Amplitude corrections up to 2PN order
Parthapratim Mahapatra, Shilpa Kastha
A parametrized multipolar gravitational wave phasing within multipolar post-Minkowskian and post-Newtonian formalism was developed in earlier works [S. Kastha et al., PRD 98, 12403…