Gravitational waves from inspiralling compact binaries in conformal gravity
arXiv:1902.02265 · doi:10.1103/PhysRevD.99.084005
Abstract
We investigate the production of gravitational waves during the inspiral of compact binaries close to their merger in the context of a conformal gravity model. The model incorporates five massive polarization degrees of freedom, besides the two massless gravitational wave polarizations of general relativity. For small graviton mass, we find that the amplitude of the gravitational waves is strongly suppressed as compared to general relativity and decreases as coalescence is approached, which contradicts the observational fact. We conclude that this model with small graviton mass, including a regime that can explain galaxy rotation curves without dark matter, cannot describe the observed gravitational wave events. For a large graviton mass, the modifications to the waveform, compared to the one from general relativity, are negligible on the relevant distance scales and hence a conformal gravity model with a large graviton mass is in agreement with LIGO/VIRGO observations and leads to chirp mass and distance estimates that agree with those from general relativity.
10 pages, 3 figures; Uses REVTeX 4.1; modified naming for the different conformal gravity models; added a paragraph in the conclusions; updated references
References in corpus (15)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Multi-messenger Observations of a Binary Neutron Star Merger
- Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
- Making Sense of Non-Hermitian Hamiltonians
- GW170814: A Three-Detector Observation of Gravitational Waves from a Binary Black Hole Coalescence
- GW170608: Observation of a 19-solar-mass Binary Black Hole Coalescence
- Swope Supernova Survey 2017a (SSS17a), the Optical Counterpart to a Gravitational Wave Source
- Dark Energy after GW170817: dead ends and the road ahead
- Strong constraints on cosmological gravity from GW170817 and GRB 170817A
- Implications of the Neutron Star Merger GW170817 for Cosmological Scalar-Tensor Theories
- No-ghost theorem for the fourth-order derivative Pais-Uhlenbeck oscillator model
- Exactly solvable PT-symmetric Hamiltonian having no Hermitian counterpart
- Fourth order Weyl gravity
- Giving up the ghost
- Comment on "Astrophysical gravitational waves in conformal gravity"