Note on post-Minkowskian expansion and Bondi coordinates
arXiv:2405.11953 · doi:10.1016/j.nuclphysb.2025.117111
Abstract
In this note, we transform the linear order (at order ) 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.
v2: comments on supertranslation ambiguity added, published version
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