Mass octupole and current quadrupole corrections to gravitational wave emission from close hyperbolic encounters

Year: 2024

Type: article

Abstract: In this paper, we study the next-to-leading order corrections in the mass multipole expansion, i.e. the mass octupole and current quadrupole, to gravitational wave production by close hyperbolic encounters of compact objects. We find that the signal is again, as in the simple quadrupole case, a burst event with the majority of the released energy occurring during the closest approach. In particular, we investigate the relative contribution to the power, both in the time and frequency domains, and total energy emitted by each order in the mass multipole expansion in gravitational waves. To do so, we include in the quadrupole term its first order post-Newtonian correction, giving this a contribution to the power of the same order as that of the mass octupole and the current quadrupole. We find specific configurations of systems where these corrections could be important and should be taken into account when analysing burst events.

Source: Classical and Quantum Gravity

DOI: 10.1088/1361-6382/ad869a

Authors: Alexander Roskill, Marienza Caldarola, Sachiko Kuroyanagi, Savvas Nesseris

Institutions: Instituto de Física Teórica, Imperial College London, Universidad Autónoma de Madrid, Nagoya 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: $3,165

Funders: Comunidad de Madrid, Ministerio de Ciencia e Innovación, Japan Society for the Promotion of Science, Consejo Superior de Investigaciones Científicas, Agencia Estatal de Investigación

OpenAlex ID: W4403387656