Particle.news
Download on the App Store
3 ARTICLES
·
8h ago

Simulations Suggest JWST’s Little Red Dots Are Rapidly Growing Black Holes

New high-resolution runs on Japan’s ATERUI III show early far-ultraviolet radiation and dense, radiation-trapping gas disks can produce fast-growing black holes that match Little Red Dot properties

Image

Overview

  • Researchers led by Sunmyon Chon used the ATERUI III supercomputer in Japan to run the most detailed zoom-in cosmological simulations to date, and the team released those results between Wednesday and Friday of mid-September.
  • The simulations show intense far-ultraviolet (FUV) light from nearby galaxies can stop a gas cloud from fragmenting into normal stars, forcing it to collapse into a single supermassive star that then forms a black hole seed.
  • After seed formation the models produce thick, dense gas disks that trap outgoing radiation and allow accretion rates dozens of times higher than typical modern rates, enabling very rapid black-hole growth.
  • The simulated objects reproduce key observable traits of JWST’s Little Red Dots—their compact size and very red spectra—so the team proposes LRDs are an early, obscured phase of fast black-hole growth rather than ordinary faint galaxies.
  • The result offers a natural, testable route to explain how supermassive black holes appeared less than 600 million years after the Big Bang, but the scenario still needs peer-reviewed publication and detailed observational tests with JWST and future data to confirm it.