Work

Note on post-Minkowskian expansion and Bondi coordinates

Year: 2025

Type: article

Abstract: In this note, we transform the linear order (at order G ) metric from a system of pointlike bodies source in the post-Minkowskian expansion to the Bondi coordinates. We show that the Bondi 4-momentum and angular momentum coincide with the relativistic definitions of 4-momentum and angular momentum for the system of pointlike bodies. The angular momentum computed at the null infinity is free of supertranslation ambiguity.

Source: Nuclear Physics B

DOI: 10.1016/j.nuclphysb.2025.117111

Authors: Pujian Mao, Baijun Zeng

Institution: Tianjin University

Language: English

Topic: Relativity and Gravitational Theory

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funder: National Natural Science Foundation of China

Awards: G260197666, G3294701509, G387644262