Gravitational waves from compact binaries to the fourth post-Newtonian order

Abstract

The precise knowledge of the gravitational phase evolution of compact binaries is crucial to the data analysis for gravitational waves. Until recently, it was known analytically (for non-spinning systems) up to the 3.5 post-Newtonian (PN) order, i.e. up to the $(v/c{)}^7$ correction beyond the leading order quadrupole formula. Using a PN-multipolar-post-Minkowskian algorithm, we have pushed the accuracy to the next 4PN level. This derivation involved challenging technical issues, due to the appearance of non-physical divergences, which have to be properly regularized, as well as effects of non-linear multipole interactions.

arXiv commentContribution to the 2023 Gravitation session of the 57th Rencontres de Moriond. 5 pages, 1 figure; v2 : references added and minor changes in the text