The recent discovery by Advanced LIGO and Advanced Virgo of a gravitational wave signal from a binary neutron star inspiral has enabled tests of general relativity (GR) with this new type of source. This source, for the first time, permits tests of strong-field dynamics of compact binaries in the presence of matter. In this Letter, we place constraints on the dipole radiation and possible deviations from GR in the post-Newtonian coefficients that govern the inspiral regime. Bounds on modified dispersion of gravitational waves are obtained; in combination with information from the observed electromagnetic counterpart we can also constrain effects due to large extra dimensions. Finally, the polarization content of the gravitational wave signal is studied. The results of all tests performed here show good agreement with GR.
B. P. Abbott et al., "Tests of General Relativity with GW170817," Physical Review Letters, vol. 123, no. 1, American Physical Society (APS), May 2019.
The definitive version is available at https://doi.org/10.1103/PhysRevLett.123.011102
Keywords and Phrases
Gravitational effects; Gravity waves; Testing, Binary neutron stars; Dipole radiations; Extra dimensions; General Relativity; Gravitational-wave signals; Newtonians; Strong field, Relativity
International Standard Serial Number (ISSN)
Article - Journal
© 2019 American Physical Society (APS), All rights reserved.
01 May 2019