Bounding the Speed of Gravity with Gravitational Wave Observations
Abstract
The time delay between gravitational wave signals arriving at widely separated detectors can be used to place upper and lower bounds on the speed of gravitational wave propagation. Using a Bayesian approach that combines the first three gravitational wave detections reported by the LIGO Scientific and Virgo Collaborations we constrain the gravitational waves propagation speed c_{gw} to the 90% credible interval 0.55 c <c_{gw}<1.42 c , where c is the speed of light in vacuum. These bounds will improve as more detections are made and as more detectors join the worldwide network. Of order 20 detections by the two LIGO detectors will constrain the speed of gravity to within 20% of the speed of light, while just five detections by the LIGOVirgoKagra network will constrain the speed of gravity to within 1% of the speed of light.
 Publication:

Physical Review Letters
 Pub Date:
 October 2017
 DOI:
 10.1103/PhysRevLett.119.161102
 arXiv:
 arXiv:1707.06101
 Bibcode:
 2017PhRvL.119p1102C
 Keywords:

 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 Version published in PRL. 5 pages, 3 figures