Abstract
It is shown that if a generalized definition of gauge invariance is used, gauge-invariant effective stress-energy tensors for gravitational waves and other gravitational perturbations can be defined in a much larger variety of circumstances than has previously been possible. In particular it is no longer necessary to average the stress-energy tensor over a region of spacetime which is larger in scale than the wavelengths of the waves and it is no longer necessary to restrict attention to high frequency gravitational waves.
- Received 4 September 1996
DOI:https://doi.org/10.1103/PhysRevD.55.3440
©1997 American Physical Society