Abstract
We find polarization modes of gravitational waves in topologically massive and new massive gravities by using the Newman-Penrose formalism where the null real tetrad is necessary to specify gravitational waves. The number of polarization modes is two for the new massive gravity and one for the topologically massive gravity, which is consistent with the metric-perturbation approach.
- Received 11 November 2011
DOI:https://doi.org/10.1103/PhysRevD.85.027501
© 2012 American Physical Society