Self-force in hyperbolic black hole encounters @LISAcommunity

Uploaded July 2022 | Updated September 2026, 1 hour ago

Scattering orbits are excellent probes of the strong-field regime around black holes. It has been shown that knowledge of the scattering angle through linear order in the mass ratio can be used to inform high order analytic expressions for scatter and bound orbits. With this motivation in mind, we describe a programme to calculate the self-force correction to the scatter angle. We show a formulation of the conservative self-force correction to the scatter angle in Schwarzschild spacetime, and thus identify the necessary self-force input. We describe a novel time-domain method for setting up such a calculation, and present results for the toy model of a scalar charge on a hyperbolic orbit.

Authors: Oliver Long, Leor Barack
Presenter: Oliver Long

Self-force in hyperbolic black hole encounters

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