What question did this study set out to answer?

This research aims to analyze the contribution of active galactic nuclei (AGN) to the reionization of the universe, particularly focusing on the early star-forming galaxies.

February 22, 2026Open Access

UNCOVERing the contribution of black holes to reionization

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This research aims to analyze the contribution of active galactic nuclei (AGN) to the reionization of the universe, particularly focusing on the early star-forming galaxies.
Employed the DELPHI semi-analytic model for analysis.
Compared findings with high-redshift datasets from JWST and ALMA.
Calculated escape fractions of ionizing radiation from AGN and star formation.
Included reionization feedback impacts on low-mass galaxies.
Reionization reaches its mid-point at z ∼ 6.9 and ends by z ∼ 5.9.
Low stellar mass star-forming galaxies provide about 77% of the total photon budget.
AGN contribute around 23% to reionization, primarily from black holes in high stellar mass systems.
AGN number densities are significant only at z ≲ 7, impacting late-stage reionization.

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Implication

Models the AGN contribution to reionization, highlighting the key role of low-mass star-forming galaxies.

Cite This Study

Dayal et al. (2025) studied this question.

synapsesocial.com/papers/699a9e00482488d673cd454c https://doi.org/10.5167/uzh-292261

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UNCOVERing the contribution of black holes to reionization

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Implication

Cite This Study

UNCOVERing the contribution of black holes to reionization

Key Points

Discussion

Implication

Cite This Study

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