Tests of gravitational wave propagation with LIGO-Virgo catalog
Xian-Liang Wang, Shu-Cheng Yang, Wen-Biao Han

TL;DR
This study tests for deviations in gravitational wave propagation speed using LIGO-Virgo data, finding no evidence for graviton mass or violations of the weak equivalence principle, thus supporting general relativity.
Contribution
It provides new constraints on graviton mass and WEP violation parameters using recent GW data, with no significant deviations observed.
Findings
No evidence of graviton mass effects.
No significant WEP violation detected.
Bayes factors favor the standard GR model.
Abstract
In the framework of general relativity (GR), gravitational waves (GWs) travel at the speed of light across all frequencies. However, massive gravity and weak equivalence principle (WEP) violation may lead to frequency-dependent variations in the propagation speed of GWs, which can be examined by comparing the theoretical and observed discrepancies in the arrival times of GW signals at various frequencies. This provides us with an opportunity to test these theories. For massive gravity, we consider that gravitons may have a nonzero rest mass. For WEP violations, we hypothesize that different massless particles exposed to the same gravitational source should exhibit varying gravitational time delays. The gravitational time delay induced by massive gravitational sources is proportional to , where the parameter in GR. Therefore, we can quantify these two deviations…
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Taxonomy
TopicsGeophysics and Gravity Measurements · Pulsars and Gravitational Waves Research · Statistical and numerical algorithms
