Unambiguous angular momentum of radiative spacetimes and asymptotic structure in terms of the center of mass system
classification
🌀 gr-qc
keywords
angularcentermassmomentumspacetimesasymptoticdefinitionframe
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We present a definition of angular momentum for radiative spacetimes which does not suffer from any ambiguity of supertranslations. We succeed in providing an appropriate notion of {\it intrinsic} angular momentum; and at the same time a definition of center of mass frame at future null infinity. We use the center of mass frame to present the asymptotic structure equations for vacuum spacetimes.
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