Astronomers have finally pinpointed the origin of a perplexing class of repeating cosmic signals that have eluded explanation for years. Using Australia's ASKAP radio telescope, the team traced the bursts to a rare binary system where a dense white dwarf is steadily pulling material from a nearby red dwarf star.
This stellar pair emits powerful radio waves and X-rays every 1.4 hours as the stolen matter spirals inward. The discovery has been described as a stellar “Rosetta stone” because it decodes the mechanism behind these mysterious signals, offering a key to understanding similar phenomena across the universe.
The white dwarf's gravitational pull strips gas from its companion, creating an accretion disk that heats up and releases energy across the electromagnetic spectrum. The regularity of the emissions—occurring like clockwork every 84 minutes—allowed researchers to match the observations to a specific astrophysical process.
Findings from this study could help astronomers identify other binary systems producing analogous signals, potentially revealing a whole class of previously hidden stellar interactions. The work also demonstrates the power of radio interferometry in resolving cosmic puzzles.
Some researchers caution that not all repeating cosmic signals may share this mechanism, and alternative explanations involving neutron stars or magnetars remain viable for other observed events.