3 papers
gr-qc2026
Radiation outer boundary conditions and near-to-far field signal transformations for the Bardeen-Press equation
Som Dev Bishoyi, Scott E. Field, Stephen R. Lau
Several theoretical and astrophysical problems - including gravitational-wave modeling for extreme mass-ratio inspirals - require accurate time-domain solutions of the spin-weight…
gr-qc2026
Source-Driven Tails in Kerr Spacetime: Nonlinear effects in Late-Time Behavior
Som Dev Bishoyi, Subir Sabharwal, Gaurav Khanna
We present the long-duration time-domain simulations of scalar-field tails in Kerr spacetimes driven by \emph{outgoing} multipolar sources. Extending the recent work in the literat…
gr-qc2025
Numerical Evidence for Non-Axisymmetric Gravitational "Hair" for Extremal Kerr Black Hole Spacetimes with Hyperboloidal Foliations
Som Dev Bishoyi, Subir Sabharwal, Gaurav Khanna
Various generalizations of the scalar, axisymmetric "horizon hair" for extremal black holes have recently appeared in the literature. In this paper, we propose an expression for a…