T Dray and M Streubel 1984 Class. Quantum Grav. 1 15 doi:10.1088/0264-9381/1/1/005
T Dray and M Streubel
Show affiliationsThe definition of angular momentum recently given by Penrose (1982) is analysed on I. It is shown that this definition is essentially a supertranslation of previous definitions. The origin dependence of Penrose's angular momentum is shown to have the correct form. Based on Penrose's expression, the authors then define a momentum for all elements of the BMS Lie algebra, which is the first such expression with the property that its flux vanishes identically in Minkowski space.
04.20.Gz Spacetime topology, causal structure, spinor structure
83C60 Spinor and twistor methods; Newman-Penrose formalism
83C30 Asymptotic procedures (radiation, news functions, H-spaces, etc.)
Issue 1 (January 1984)
T Dray and M Streubel 1984 Class. Quantum Grav. 1 15
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