Persistence of Gravitational-Wave Memory

Researchers predict the existence of three new long-lived signatures of gravitational waves, as part of a unified mathematical framework for identifying such effects. The team’s framework accounts for the previously predicted persistent observables—including the LIGO mirror example—in a single mathematical formulation, and it also predicts three new ones. The small number of black hole collisions so far detected by LIGO and Virgo is insufficient to provide the cumulative data needed to spot persistent gravitational-wave observables.

Source: physics.aps.org