Meanwhile, in a white dwarf binary…

Synchronized star pairs unleash radio bursts via a Jupiter-Io-like mechanism phys.org

Certain binary stars pulse with radio bursts on a slow, clockwork beat, and the explanation turns out to be borrowed from our own solar system: the same electrical circuit that links Jupiter to its moon Io. In these pairs, a dead white dwarf and a small red star are magnetically wired together, and the current lights up the radio sky.