FRB identified as "Plasma Bubbles"

https://scitechdaily.com/plasma-bubbles-the-secret-engines-behind-fast-radio-bursts/

"Gabriele Bruni, INAF researcher and lead author of the paper, explains, “Our observations confirm that the persistent radio emissions from FRBs behave as expected from the nebular emission model, indicating a bubble of ionized gas surrounding the central engine. This allows us to better understand the physical relationship between the engine of FRBs and the surrounding nebula.”"

-NRAO