Work

Universal gravitational self-force for a point mass orbiting around a compact star

Year: 2024

Type: article

Abstract: In this work, we study the gravitational backreaction (i.e., the ``self-force'') of a point mass moving around a nonrotating, compact star on a circular orbit. We find that the additional self-force, comparing with the case with a point mass orbiting around a Schwarzschild black hole, can be well characterized by a universal frequency-dependent function multiplied by the (dynamical) tidal deformability of the compact star. This finding provides the foundation for building the waveform model for an extreme mass-ratio inspiral system around a starlike black hole mimicker, which is relevant for testing general relativity and exotic compact objects with space-borne gravitational-wave detectors.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.110.044066

Authors: Xuefeng Feng, Huan Yang

Institutions: Beijing Institute of Mathematical Sciences and Applications, Tsinghua University, Perimeter Institute, University of Guelph

Language: English

Topic: Pulsars and Gravitational Waves Research

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Innovation, Science and Economic Development Canada, Government of Canada, Institut Périmètre de physique théorique, Ministry of Colleges and Universities, Natural Sciences and Engineering Research Council of Canada

OpenAlex ID: W4401994089

FWCI: 0.383

Cites: 65

Cited by: 2

Related to: 10