Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2003-12-30
J.Korean Phys.Soc. 45 (2004) S46-S50
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
4 revtex4 pages, 1 eps figure, presented at 6th APCTP International Conference on Gravitation and Astrophysics, Ewha Womans Un
Scientific paper
A recent refinement of Penrose's conformal framework for asymptotically flat space-times is summarized. The key idea concerns advanced and retarded conformal factors, which allow a rigid description of infinity as a locally metric light cone. In the new framework, the Bondi-Sachs energy-flux integrals of ingoing and outgoing gravitational radiation decay at spatial infinity such that the total radiated energy is finite, and the Bondi-Sachs energy-momentum has a unique limit at spatial infinity, coinciding with the uniquely rendered ADM energy-momentum.
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