paper

Polarizations of gravitational waves in gravity

arXiv:1701.05998 · doi:10.1103/PhysRevD.95.104034

Abstract

We point out that there are only three polarizations for gravitational waves in gravity, and the polarization due to the massive scalar mode is a mix of the pure longitudinal and transverse breathing polarization. The classification of the six polarizations by the Newman-Penrose quantities is based on weak, plane and null gravitational waves, so it is not applicable to the massive mode.

no figure, comments are welcome, PRD in press

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