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May 28, 2026

GLIMPSE-D: Metallicity decline in faint galaxies: Implications for luminosity function and re-ionisation budget

Damien Korber Daniel Schaerer R. Marques-Chaves Angela Adamo Arghyadeep Basu John Chisholm Miroslava Dessauges-Zavadsky Kristen. B. W. McQuinn Alberto Saldana-Lopez Hakim Atek Ryan Endsley Seiji Fujimoto Lukas J. Furtak Vasily Kokorev Rohan P. Naidu Richard Pan

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Key Points

This research measures the decline in metallicity in faint galaxies to understand its implications for cosmic re-ionisation and luminosity functions.
Measured R3 ratios for 54 galaxies through gravitational lensing in the GLIMPSE-D survey.
Derived oxygen abundances using calibrated relationships.
Applied four evolutionary models of R3 with UV emission to explore ionising photon production.
Significant decline in R3 values observed below muv≳-18, indicating lower metallicities in fainter galaxies.
Galaxies with L_ 41-42 dominate ionising contributions at 8<z<9, while contributions equalize at 7<z<8.
Intermediate models align with observational constraints on ionising photon budget while extreme models misestimate it.

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Implication

Examines metallicity decline in galaxies, suggesting key role in re-ionisation budget.

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Cite This Study

Korber et al. (2026) studied this question.

synapsesocial.com/papers/6a211689d499ed480b16f818 https://doi.org/10.1051/0004-6361/202659018/pdf

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