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Star formation and AGN activity 500 Myr after the Big Bang: Insights from JWST

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arxiv 2310.03081 v2 pith:MJQNM3BX submitted 2023-10-04 astro-ph.GA

Jordan C. J. D'Silva , Simon P. Driver , Claudia D. P. Lagos , Aaron S. G. Robotham , Jake Summers , Rogier A. Windhorst This is my paper · ORCID
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abstract

We consider the effect of including an active galactic nuclei (AGN) component when fitting spectral energy distributions of 109 spectroscopically confirmed $z\approx 3.5-12.5$ galaxies with JWST. Remarkably, we find that the resulting cosmic star formation history is $\approx 0.4$ dex lower at $z\gtrsim 9.5$ when an AGN component is included in the fitting. This alleviates previously reported excess star formation at $z\gtrsim 9.5$ compared to models based on typical baryon conversion efficiencies inside dark matter halos. We find that the individual stellar masses and star formation rates can be as much as $\approx 4$ dex lower when fitting with an AGN component. These results highlight the importance of considering both stellar mass assembly and supermassive black hole growth when interpreting the light distributions of among the first galaxies to ever exist.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Dating N loud AGNs at high redshift: GS3073 as a snapshot of wCen like evolution of a nuclear star cluster

    astro-ph.CO 2025-07 conditional novelty 6.0 of 10

    GS3073's extreme nitrogen abundance is attributed to undiluted winds from 3 to 4 solar mass AGB stars, giving an age of 270 to 440 million years and requiring intermittent super-Eddington black hole growth.

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