Delimitando a velocidade da gravidade com as observações de ondas gravitacionais

Bounding the Speed of Gravity with Gravitational Wave Observations

Neil Cornish, Diego Blas, and Germano Nardini

Phys. Rev. Lett. 119, 161102 – Published 18 October 2017

Source/Fonte

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 

${}_{\mathrm{gw}}$

 to the 90% credible interval 

$0.55c<{}_{\mathrm{gw}}<1.42c$

, 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 LIGO-Virgo-Kagra network will constrain the speed of gravity to within 1% of the speed of light.

Received 19 July 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.161102

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Research Areas

Alternative gravity theories Gravitational waves Gravitation, Cosmology & Astrophysics

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