Polarizations of gravitational waves in $f(R)$ gravity
General Relativity and Quantum Cosmology
2017-05-31 v3 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
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.
Keywords
Cite
@article{arxiv.1701.05998,
title = {Polarizations of gravitational waves in $f(R)$ gravity},
author = {Dicong Liang and Yungui Gong and Shaoqi Hou and Yunqi Liu},
journal= {arXiv preprint arXiv:1701.05998},
year = {2017}
}
Comments
no figure, comments are welcome, PRD in press