Work

On the motion of compact objects in relativistic viscous fluids

Year: 2025

Type: article

Abstract: We present a world-line effective field theory of compact objects moving relativistically through a viscous fluid. The theory is valid when velocity gradients are small compared to the inverse size of the object. Working within the EFT eliminates the need to solve a boundary value problem by turning all interactions between the fluid and the object into a source term in the action. We use the EFT to derive the relativistic equations of motion for a compact object immersed in a viscous fluid in a curved background, when the relative velocity of the object and the fluid is small compared to the speed of light.

Source: Journal of Cosmology and Astroparticle Physics

DOI: 10.1088/1475-7516/2025/04/014

Authors: Beka Modrekiladze, Ira Z. Rothstein, Jordan Wilson-Gerow

Institution: Carnegie Mellon University

Language: English

Topic: Pulsars and Gravitational Waves Research

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,290

Funder: U.S. Department of Energy