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publications
Numerical Evidence for Non-Axisymmetric Gravitational Hair for Extremal Kerr Black Hole Spacetimes with Hyperboloidal Foliations
Published in General Relativity and Gravitation, Springer, 2025
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Source-Driven Tails in Kerr Spacetime: Nonlinear effects in Late-Time Behavior
Published in arXiv (gr-qc), 2026
Recommended citation: Som Dev Bishoyi, Subir Sabharwal, and Gaurav Khanna. (2026). "Source-Driven Tails in Kerr Spacetime: Nonlinear effects in Late-Time Behavior." arXiv:2601.11484 [gr-qc]. https://arxiv.org/pdf/2601.11484
Radiation outer boundary conditions and near-to-far field signal transformations for the Bardeen-Press equation
Published in Submitted to SIAM journal of Scientific Computing, 2026
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talks
Determining extremality of Reissner-Nordstrom black holes using late time tails at $\mathscr{I^{+}}$
Published:
This talk discusses methods for determining the extremality of Reissner-Nordstrom black holes by analyzing late-time tail behavior at spatial infinity, presented at the APS April Meeting 2024.
Long simulations of extreme mass ratio inspirals by solving the Teukolsky equation with singular source terms
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This talk presents techniques for performing long-duration simulations of extreme mass ratio inspirals (EMRIs) using solutions to the Teukolsky equation with singular source terms, presented at the APS April Meeting 2025.
Exact boundary conditions for the Teukolsky equation
Published:
This talk discusses exact boundary conditions for the Teukolsky equation in the context of scientific machine learning applications to gravitational wave astronomy at the ICERM workshop.
Exact boundary conditions for the Teukolsky equation
Published:
This talk presents work on exact boundary conditions for the Teukolsky equation, presented at the Prospects in Theoretical Physics workshop at the Institute of Advanced Study.
Scalar and gravitational horizon hair as observable imprints of extremal black holes
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This invited talk presents recent developments in understanding scalar and gravitational horizon hair as observable imprints of extremal black holes, discussed at the Extremal Black Holes and Black hole thermodynamics workshop at ICERM.
Radiation Outer Boundary Conditions for the Teukolsky equation
Published:
This talk presents my recent work on radiation outer boundary conditions for the Bardeen-Press equation. This technique helps us to solve the BP equation in the time domain but with a much smaller computational domain. This helps in producing high resolution simulations efficiently, since we can have $\Delta x$ and $\Delta t$ small. Without this technique, a smaller computational domain would lead to spurious reflections from the outer boundary, which can contaminate the true physical solution.
teaching
At University of Massachusetts Dartmouth
Graduate course, Department of Mathematics, 2024