Astronomers using NASA's James Webb Space Telescope have discovered three actively accreting supermassive black holes within a single distant galaxy [1].
This discovery provides critical evidence regarding how supermassive black holes grew and merged during the dawn of the universe. Finding three feeding black holes in one system challenges existing models of early galactic evolution and the speed at which these massive objects accumulate mass.
The galaxy, identified as J0148-4214, was observed as it existed in the early universe [1], [2]. Data indicates the galaxy was observed at a time when the universe was about 1.2 billion years old [1]. Other estimates suggest the galaxy was less than 1.3 billion years old [3] during this period.
Supermassive black holes are typically found at the centers of galaxies. The presence of three actively feeding holes suggests a complex history of galactic mergers, events where smaller galaxies collide and combine. As these galaxies merge, their central black holes eventually sink toward the new center of mass, where they may orbit one another before finally merging into a single, larger entity.
The James Webb Space Telescope's ability to detect these objects stems from its infrared capabilities, which allow it to peer through cosmic dust and see light from the most distant reaches of space [1]. By observing the accretion disks, the swirling rings of gas and matter falling into the black holes, astronomers can confirm that these objects are actively feeding [2], [3].
Researchers said the findings help map the timeline of the early universe. Understanding the relationship between the growth of a galaxy and the growth of its central black holes remains a primary goal for astrophysicists studying the period shortly after the Big Bang [1], [3].
“Three actively accreting supermassive black holes within a single distant galaxy”
The detection of multiple active supermassive black holes in J0148-4214 suggests that galactic mergers were more frequent or occurred more rapidly than previously theorized in the early universe. This supports the theory that hierarchical merging, where small structures combine to form larger ones, is a fundamental driver of both galaxy and black hole growth.
