Dead white dwarf produces thousand-year shock wave

Astronomers have reported the detection of a shock wave emanating from a dead white dwarf that lacks any observable surrounding disk, describing the phenomenon as “something never seen before.” The observation reveals that the shock wave has persisted for at least 1,000 years, despite the star’s inactive status.

Researchers suggest that the white dwarf’s magnetic field may play a partial role in sustaining the shock, while also acknowledging the possibility of an unidentified “mystery engine” contributing to the effect. The dead white dwarf continues to generate a shock wave that has lasted at least 1,000 years, with its magnetic field and a possible mystery engine implicated.