August 23, 2024Open Access

The Ultraviolet Slopes of Early Universe Galaxies: The Impact of Bursty Star Formation, Dust, and Nebular Continuum Emission

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The UV slopes of galaxies exhibit diversity, with unattenuated stellar populations showing values from beta ~ -3 to -2.2.
A significant increase in dust obscuration occurs between redshifts z ~ 8-10, impacting UV slope observations and galaxy classifications.
Cosmological simulations reveal intricate relationships between bursty star formation, dust, and the nebular continuum's effects on UV emissions in early galaxies. The findings suggest that nebular contributions must evolve to match observations at high redshift.

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Theoretical model shows UV slopes influenced by dust and bursty star formation in early galaxies, suggesting significant evolution over time.

Narayanan et al. (2024) studied this question.

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Theoretical model shows UV slopes influenced by dust and bursty star formation in early galaxies, suggesting significant evolution over time.