Astronomers have proposed a new explanation for the origin of Luminous Fast Blue Optical Transients (LFBOTs), rare cosmic explosions characterized by their intense blue and ultraviolet light and brief duration. Since their first detection in 2018, only 14 such events have been recorded. These phenomena are notable for their extreme brightness, visible across hundreds of millions to billions of light-years.

Researchers at Harvard University suggest that LFBOTs result from collisions between compact stellar remnants—such as black holes or neutron stars—and Wolf-Rayet stars, which are among the hottest types of stars in the universe. The proposed scenario involves binary star systems where a massive, "cannibal" star strips material from its companion, transforming the donor star into a Wolf-Rayet while itself edging closer to the end of its life cycle. As the cannibal star nears a core-collapse supernova phase, it becomes a compact object. Eventually, the two stars collide, triggering an LFBOT event.

The complexity of these interactions requires precise conditions, according to co-author Anya Nugent. She noted that the donor star must lose material to its companion without being completely destroyed, a delicate balance that helps explain why LFBOTs are so rare. The team anticipates that continued deep-space observations will increase the number of identified LFBOTs, providing additional data to confirm this model.

This new understanding could shed light on a previously unexplained type of cosmic explosion, adding critical insight into stellar evolution and binary star interactions.