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Bounding the Speed of Gravity with Gravitational Wave Observations

Research output: Contribution to journalArticlepeer-review

Neil Cornish, Diego Blas, Germano Nardini

Original languageEnglish
Pages (from-to)161102
Number of pages1
JournalPhysical Review Letters
Volume119
Early online date18 Oct 2017
DOIs
Accepted/In press21 Sep 2017
E-pub ahead of print18 Oct 2017
Published20 Oct 2017

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Abstract

The time delay between gravitational wave signals arriving at widely separated detectors can be used toplace upper and lower bounds on the speed of gravitational wave propagation. Using a Bayesian approach thatcombines the first three gravitational wave detections reported by the LIGO Scientific and VirgoCollaborations we constrain the gravitational waves propagation speed cgw to the 90% credible interval0.55care made and as more detectors join the worldwide network. Of order 20 detections by the two LIGO detectorswill constrain the speed of gravity to within 20% of the speed of light, while just five detections by the LIGOVirgo-Kagra network will constrain the speed of gravity to within 1% of the speed of light.

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