Researchers measure the environment where the first supermassive black holes formed

Researchers measured the environment where the first supermassive black holes formed, observing galaxies hosting seeds of SMBHs at high-redshifts (z < 1 billion years after the Big Bang). The study, led by Alessandro Trinca, used simulations and models to explore how dark matter mergers and cosmic overdensities could facilitate the formation of DCBHs. The research found 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 results support the DCBH scenario and highlight the importance of high-redshift quasars for future surveys. The team emphasized that the number of detectable systems predicted here will serve as a benchmark for upcoming observational campaigns.

• The research was conducted by an international team of astronomers from multiple universities.
• The simulations used cosmological zoom-in software based on the GIZMO particle-based code and the Cosmic Archaeology Tool (CAT).
• The team's work focused on predicting the observational features of DCBH descendants near high-redshift quasars at z ~7.
• The results indicate that direct collapse could form SMBH seeds as early as 13.64 billion years ago.
• The study's findings bolster the case for the DCBH scenario and present opportunities for future JWST surveys.
• The team concluded that their results provide a theoretical framework to test conditions favoring heavy seed formation and assess the role of direct collapse in SMBH population formation.

The study's findings suggest that early massive black hole formation preferentially occurs in highly clustered, overdense environments, and the number of detectable systems predicted here will serve as a concrete benchmark for upcoming observational campaigns.

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