Distant 'Black Hole Star' Sheds Light on Early Universe Mystery
A team of astronomers has identified the most distant known example of a black hole star—a rare object consisting of a supermassive black hole actively accreting material from a companion star. The discovery, made using observations from the James Webb Space Telescope (JWST), offers new clues about the mysterious "little red dots" that have puzzled scientists since the telescope began returning images of the early universe.
The little red dots are compact, extremely red sources detected in the first billion years after the Big Bang. Their nature has been debated since JWST first observed them, with some scientists suggesting they could be active galactic nuclei—regions around black holes that glow brightly as they consume surrounding matter—while others proposed they might be dense concentrations of stars.
The newly discovered black hole star, located at a record distance, appears to be a scaled-down version of these little red dots, suggesting a direct evolutionary link. According to the research team, the object demonstrates that such black hole-star systems existed relatively soon after the universe formed, supporting the hypothesis that the little red dots harbor active black holes at their centers.
The finding helps constrain models of how supermassive black holes formed and grew in the early universe—a question that remains one of cosmology's outstanding problems. Understanding whether these compact early objects could have grown quickly enough to power the little red dots has been challenging, but this distant example provides a potential template for what the youngest versions of these systems might look like.