Pith. sign in

REVIEW 3 cited by

GLIMPSE-D: Metallicity Decline in Faint Galaxies: Implications for [O III]+Hb Luminosity Function and Reionisation Budget

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2601.19989 v2 pith:CIDA3UQT submitted 2026-01-27 astro-ph.GA

GLIMPSE-D: Metallicity Decline in Faint Galaxies: Implications for [O III]+Hb Luminosity Function and Reionisation Budget

Damien Korber , Daniel Schaerer , Rui Marques-Chaves , Angela Adamo , Arghyadeep Basu , John Chisholm , Miroslava Dessauges-Zavadsky , B.W. Kristen. McQuinn
show 8 more authors
Alberto Saldana-Lopez Hakim Atek Ryan Endsley Seiji Fujimoto J. Lukas Furtak Vasily Kokorev P. Rohan Naidu Richard Pan
This is my paper
classification astro-ph.GA
keywords galaxiesmodelsluminositybudgetcontributiondeclinefaintglimpse-d
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
0 comments
read the original abstract

We report the measurement of the R3=[O III]5008/Hb ratios for 54 galaxies in the GLIMPSE-D survey. Thanks to gravitational lensing, our sample includes galaxies with -20 < Muv < -14 at z=6-9. We derive oxygen abundances using calibrated relationships. We observe a significant decline in R3 values below Muv > -18, which we interpret as evidence of decreasing metallicities in fainter regimes. We explore four prescription models of the evolution of R3 with UV emission based on the new measurements and results from previous surveys. Applying these models to the GLIMPSE [O III]+Hb luminosity functions, we measure and extrapolate the ionising photon production rate $\dot{N}_{ion}$ of galaxies down to very faint limits SFR(Ha) > 5e-3 Msun/yr. Our results support the dominant contribution of star-forming galaxies to reionisation, and are consistent with the recent discovery of ultra-faint metal-poor galaxies. Our measurements of the relative contribution of each luminosity bin show that galaxies with L(Ha)~1e41 to 1e42 erg/s dominate at 8<z<9, but the relative contributions become more uniform at $7<z<8$. Extreme models either under- or over-estimate the ionising photon budget, while intermediate models align with recent observational constraints.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 3 Pith papers

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

  1. Reionization driven by the few: the ionizing budget of galaxies at z=5-10 from JWST/NIRSpec

    astro-ph.GA 2026-07 conditional novelty 6.0

    A spectral-fitting analysis of 1428 JWST galaxies yields a cosmic ionizing photon budget in which ~20% of high-escape-fraction galaxies produce ~87% of the photons that reionize the universe, ending reionization at z~5.8.

  2. Bright Galaxies at Cosmic Dawn: A Cloud-Scale Star Formation Model Unifying Variable SFE, IMFs, and Stochasticity

    astro-ph.GA 2026-07 conditional novelty 6.0

    A cloud-based semi-analytic model shows that a top-heavy stellar initial mass function and a cloud-property-dependent star-formation efficiency, rather than cloud mass or density, most strongly shape the UV luminosity...

  3. How can we finally see the first light? Status and perspective in the search for Population III stars

    astro-ph.GA 2026-06 unverdicted novelty 2.0

    A review of theoretical models for the first stars and observational strategies including JWST searches, near-field studies, and lensing, noting growing candidates and narrowing parameter space.