Rule-breaking supermassive black hole discovered in the early universe

An international research team led by scientists at Waseda University and Tohoku University has discovered an extraordinary quasar in the early universe that hosts one of the fastest-growing supermassive black holes known at this mass scale. Observations with the Subaru Telescope reveal a striking, rule-breaking combination: the quasar is undergoing extremely rapid accretion while simultaneously shining brightly in X-rays and producing strong radio emission from a jet—features that many theoretical models do not expect to coexist. This unexpected juxtaposition of phenomena offers a new perspective on how supermassive black holes grow in the early universe.