Webb spots the birth of a giant galaxy and a supermassive black hole
Summary: Using JWST, astronomers caught a massive galaxy taking shape in the early universe, identifying a compact group of at least six galaxies likely to merge into a single enormous system alongside a supermassive black hole.
The James Webb Space Telescope has captured the formation of a massive galaxy in the very early universe. A research team identified a compact group of at least six galaxies clustered tightly together at very high redshift, expected to merge into a single enormous galactic system as their evolution continues.
Notably, this merger event is not occurring in isolation. Observational data indicate that as the galaxy group undergoes gravitational collapse and coalescence, a supermassive black hole is being born simultaneously. This offers new observational clues into how supermassive black holes can reach enormous masses within extremely short timescales in the early universe.
Prior theoretical models have long suggested that massive galaxies in the early universe could grow rapidly through successive mergers while simultaneously nurturing supermassive black holes at their centers. The JWST observation is the first to catch both processes occurring together in a single system, providing direct evidence for the co-evolution picture of galaxies and their central black holes.