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14 papers · 1 filter
Electromagnetic wave scattering by Schwarzschild black holes
Luís C. B. Crispino, Sam R. Dolan, Ednilton S. Oliveira
We analyze the scattering of a planar monochromatic electromagnetic wave incident upon a Schwarzschild black hole. We obtain accurate numerical results from the partial wave method…
Generating Electromagnetic Waves from Gravity Waves in Cosmology
P. A. Hogan, S. O'Farrell
Examples of test electromagnetic waves on a Friedmann-Lemaitre-Robertson-Walker(FLRW) background are constructed from explicit perturbations of the FLRW space-times describing grav…
Pade Approximants of the Green Function in Spherically Symmetric Spacetimes
Marc Casals, Sam Dolan, Adrian Ottewill +1
We investigate the scalar Green function for spherically symmetric spacetimes expressed as a coordinate series expansion in the separation of the points. We calculate the series ex…
Self-Force Calculations with Matched Expansions and Quasinormal Mode Sums
Marc Casals, Sam R. Dolan, Adrian C. Ottewill +1
We present the first application of the Poisson-Wiseman-Anderson method of matched expansions, to compute the self-force acting on a point particle moving in a curved spacetime. Th…
On Generating Gravity Waves with Matter and Electromagnetic Waves
C. Barrabes, P. A. Hogan
If a homogeneous plane light-like shell collides head-on with a homogeneous plane electromagnetic shock wave having a step-function profile then no backscattered gravitational wave…
Scattering and absorption of gravitational plane waves by rotating black holes
Sam R. Dolan
This is a study of the scattering and absorption of planar gravitational waves by a Kerr black hole in vacuum. We apply the partial wave method to compute cross sections for the sp…