Spin the black circle: horizon absorption on non-circular, planar binary black hole dynamics

by Dr Rossella Gamba

Friday 28 Mar 2025, 14:00 → 16:00 Europe/Berlin

Abbeanum/1-102 - Seminarraum (TPI, FSU Jena)

Binary systems of black holes emit gravitational waves as they move through their orbits. While most of the emitted radiation escapes to future null infinity, a small fraction is absorbed by the black holes themselves. This is known as horizon absorption, and causes the black holes' masses and spins to change as the system evolves.

In this talk I will discuss the effect of horizon absorption on the induced spin and mass variations for highly energetic BH scatterings. I will present analytical predictions for these variations, compare them to numerical relativity results and assess their astrophysical relevance.