Abstract
Recently, in Phys. Rev. D 98, 084002 (2018), an investigation was carried out on the gravitational radiation from binary systems in conformal gravity and massive conformal gravity. According to the authors of the paper, these two theories differ only by the sign of a parameter in the matter action of a general conformal theory. For a negative parameter, the general conformal theory indeed corresponds to conformal gravity. However, here, we argue that for a positive parameter the general conformal theory does not correspond to massive conformal gravity.
- Received 2 October 2018
DOI:https://doi.org/10.1103/PhysRevD.99.048501
© 2019 American Physical Society
Physics Subject Headings (PhySH)
Gravitation, Cosmology & Astrophysics