Next-to-leading order corrections to gravitational wave emission from close hyperbolic encounters

Author:

Alex Roskill, Marienza Caldarola, Sachiko Kuroyanagi, Savvas Nesseris

Keyword:

General Relativity and Quantum Cosmology, General Relativity and Quantum Cosmology (gr-qc), High Energy Astrophysical Phenomena (astro-ph.HE)

journal:

IFT-UAM/CSIC-23-130

date:

2023-10-10 16:00:00

Abstract

In this paper, we study the next-to-leading order corrections of gravitational wave production by hyperbolic encounters of compact objects. The signal is a burst event, with the majority of the released energy occurring during the closest approach. We discuss the lowest order term contribution to the emission, which is the quadrupole radiation, and also the next-to-leading terms, i.e., the mass octupole and the quadrupole current radiation, investigating the relative contribution to the power emitted in gravitational waves and total energy emitted, both in the time and frequency domains. We find specific configurations of systems where these corrections could be important and should be taken into account when analysing burst events.

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