Relativistic dynamical friction in a collisional fluid
Enrico Barausse (SISSA, Italy)
TL;DR
This paper investigates the relativistic dynamical friction force on a body moving in a gaseous medium, generalizing previous models and exploring implications for black hole inspirals.
Contribution
It provides a generalized calculation of relativistic dynamical friction for straight-line and circular motions, extending prior work in the field.
Findings
Derived formulas for relativistic dynamical friction in different motions
Generalized previous non-relativistic results to relativistic speeds
Suggested applications to black hole inspiral scenarios
Abstract
The dynamical friction force experienced by a body moving at relativistic speed in a gaseous medium is examined. This force, which arises due to the gravitational interaction of the body with its own gravitationally-induced wake, is calculated for straight-line and circular motion, generalizing previous results by several authors. Possible applications to the study of extreme mass-ratio inspirals around strongly-accreting supermassive black holes are suggested.
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