Note on post-Minkowskian expansion and Bondi coordinates

2024/05/20 by Pujian Mao, Mao, Pujian, Baijun Zeng +1 · 2 citations
Physics and Astronomy · #Advanced Differential Geometry Research #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #Relativity and Gravitational Theory

paper · pdf · doi:10.48550/arxiv.2405.11953

openalex publication_date 2024/05/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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.

Cited by

• Twisting asymptotically-flat spacetimes
• From harmonic to Newman-Unti coordinates at the second post-Minkowskian order

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