14–15 Dec 2023
Centre for Particle Theory
Europe/London timezone

Adiabatic inspirals under electromagnetic radiation reaction on Kerr spacetime

14 Dec 2023, 16:00
20m
Ph8 (Centre for Particle Theory)

Ph8

Centre for Particle Theory

Long Talk (20 mins) Black Holes

Speaker

Ethan James German (University of Sheffield)

Description

Consider an electrically charged particle orbiting a spinning black hole, described by the Kerr spacetime. As the charged particle moves it undergoes a radiation-reaction process, driven by the electromagnetic force, causing it to lose energy and angular momentum, inspiraling towards the black hole until the final plunge. In this work we calculate how the orbital parameters for eccentric orbits change along the inspiral. We make comparisons to gravitationally driven inspirals and non-relativistic Keplerian approximations based on the Abraham-Lorentz force law. We find the electromagnetic inspirals circularize less efficiently than gravitational inspirals, and we quantify the effect of the black hole spin.

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Primary author

Ethan James German (University of Sheffield)

Presentation materials