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.
Relativistic dynamical friction in a collisional fluid / Barausse, E. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - 382:2(2007), pp. 826-834. [10.1111/j.1365-2966.2007.12408.x]