A new geometric invariant on initial data for the Einstein equations.
作者信息
Dain Sergio
机构信息
Albert-Einstein-Institut, am Mühlenberg 1, D-14476 Golm, Germany.
出版信息
Phys Rev Lett. 2004 Dec 3;93(23):231101. doi: 10.1103/PhysRevLett.93.231101. Epub 2004 Dec 1.
Abstract
For a given asymptotically flat initial data set for Einstein equations a new geometric invariant is constructed. This invariant measures the departure of the data set from the stationary regime; it vanishes if and only if the data are stationary. In vacuum, it can be interpreted as a measure of the total amount of radiation contained in the data.
摘要
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