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arXiv · 2405.11953

Note on post-Minkowskian expansion and Bondi coordinates

Pujian Mao·Baijun Zeng
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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.

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Pujian Mao, Baijun Zeng. 2024-05-20. Note on post-Minkowskian expansion and Bondi coordinates. https://doi.org/10.1016/j.nuclphysb.2025.117111

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