Polarization and speed of gravitational waves in hybrid metric-Palatini f(R)-gravity

Abstract

The question of the correspondence between the number of degrees of freedom and the number of polarization states in hybrid metric-Palatini f(R)-gravity is considered. It is shown that the scalar transverse breathing and longitudinal modes are a mixture of one polarization state. The speed of gravitational waves propagation in hybrid f(R)-gravity is calculated.

6 pages. arXiv admin note: text overlap with arXiv:1907.06919

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• Images of the accretion disk in Hybrid metric-Palatini gravity