Testing the wormhole echo hypothesis for GW231123
Researchers tested if short gravitational-wave event GW231123 could be modeled as a post-merger wormhole echo instead of a standard binary black hole merger. Using Bayesian model comparison, they found weak-to-moderate support for the echo hypothesis (Bayes factor 1.87). This suggests the signal is more compatible with an echo description than previous events like GW190521, though the evidence is not decisive.