TY - JOUR

T1 - Electromagnetic radiation reaction and energy extraction from black holes

T2 - The tail term cannot be ignored

AU - Santos, João S.

AU - Cardoso, Vitor

AU - Natário, José

N1 - Publisher Copyright: © 2023 American Physical Society.

PY - 2023

Y1 - 2023

N2 - We study electromagnetic radiation reaction in curved space and the dynamics of radiating charged particles. The equation of motion for such particles is the DeWitt-Brehme equation, and it contains a particularly complicated, nonlocal, tail term. It has been claimed that the tail term can be neglected in certain magnetized black hole spacetimes, and that radiation reaction may then lead to energy extraction ("orbital widening") in the absence of an ergoregion. We show that such claims are incorrect, at least in the Newtonian limit: the tail term can never be neglected consistently in the relevant scenarios, and when it is included the reported energy extraction no longer occurs. Thus, previous results are called into question by our work.

AB - We study electromagnetic radiation reaction in curved space and the dynamics of radiating charged particles. The equation of motion for such particles is the DeWitt-Brehme equation, and it contains a particularly complicated, nonlocal, tail term. It has been claimed that the tail term can be neglected in certain magnetized black hole spacetimes, and that radiation reaction may then lead to energy extraction ("orbital widening") in the absence of an ergoregion. We show that such claims are incorrect, at least in the Newtonian limit: the tail term can never be neglected consistently in the relevant scenarios, and when it is included the reported energy extraction no longer occurs. Thus, previous results are called into question by our work.

U2 - 10.1103/PhysRevD.107.064046

DO - 10.1103/PhysRevD.107.064046

M3 - Journal article

AN - SCOPUS:85151256727

VL - 107

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 6

M1 - 064046

ER -