Researchers Measure the Environment Where the First Supermassive Black Holes Formed

Researchers using the James Webb Space Telescope found that in the early Universe, at high-redshift values (z < 1 billion years after the Big Bang), galaxies hosted what appeared to be the "seeds" of supermassive black holes (SMBHs). The discovery challenges existing models of black hole formation, which suggest SMBHs form through the merger of smaller black holes. Instead, the study considers a different pathway where massive clouds of cold gas coalesce at the center of early galaxies to form black holes, known as the Direct-Collapse Black Hole (DCBH) scenario. The research was led by Alessandro Trinca, a Postdoctoral Research Associate at the University of Edinburgh's Institute for Astronomy and Royal Observatory. The team combined high-resolution N-body simulations of Dark Matter merger trees with a semi-analytic model of BH formation and galaxy co-evolution. The results revealed that massive black hole seeds could form via direct collapse as early as 13.64 billion years ago, less than 500 million years after the Big Bang. These findings support the DCBH scenario and highlight the importance of environmental factors in black hole formation. The study also suggests that future JWST surveys may identify a large population of quasar-companion AGN candidates, providing a benchmark for upcoming observational campaigns.

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