Abstract
Using a large sample of sub-L-* galaxies, with similar UV magnitudes, M-UV similar or equal to -19 at z similar or equal to 6, extracted from the FirstLight simulations, we show the diversity of galaxies at the end of the reionization epoch. We find a factor similar to 40 variation in the specific star formation rate (sSFR). This drives a similar to 1 dex range in equivalent width of the [O III]lambda 5007 line. Variations in nebular metallicity and ionization parameter within H II regions lead to a scatter in the equivalent widths and [O III]/H alpha line ratio at a fixed sSFR. [O III]-bright ([O III]/H alpha>1) emitters have higher ionization parameters and/or higher metallicities than H alpha-bright ([O III]/H alpha
| Original language | English |
|---|---|
| Journal | Monthly Notices of the Royal Astronomical Society |
| Volume | 504 |
| Issue number | 3 |
| Pages (from-to) | 4472-4480 |
| Number of pages | 9 |
| ISSN | 0035-8711 |
| DOIs | |
| Publication status | Published - 1 Jul 2021 |
Funding
We thank the anonymous referee for comments that improve the quality of this paper. We acknowledge stimulating discussions with Xiangcheng Ma, Sune Toft, and Luis Colina. DC is a Ramon-Cajal Researcher and is supported by the Ministerio de Ciencia, Innovacion y Universidades (MICIU/FEDER) under research grant PGC2018-094975-C21. This work has been funded by the ERC Advanced Grant, STARLIGHT: Formation of the First Stars (project number 339177). RSK and SCOG also acknowledge support from the DFG via SFB 881 'The MilkyWay System' (sub-projects B1, B2, and B8) and SPP 1573 'Physics of the Interstellar Medium' (grant number GL 668/2-1) and KL 1358/19-2. AF acknowledges the support from grant PRIN MIUR 2017-20173ML3WW_001. The authors gratefully acknowledge the Gauss Center for Supercomputing for funding this project by providing computing time on the GCS Supercomputer SuperMUC at Leibniz Supercomputing Centre (Project ID: pr92za). The authors acknowledge support by the state ofBaden-Wurttemberg through bwHPC. We thank the BPASS team for sharing their database of SSPs and emission lines. This work made use of the v2.1 of the Binary Population and Spectral Synthesis (BPASS) models as last described in Eldridge et al. (2017).
Keywords
- galaxies: evolution
- galaxies: formation
- galaxies: high-redshift
- STAR-FORMATION RATE
- ULTRA DEEP FIELD
- TO 7 GALAXIES
- LESS-THAN 7
- FORMATION RATES
- STELLAR MASS
- NEBULAR EMISSION
- REIONIZATION
- Z-SIMILAR-TO-6
- SPITZER/IRAC
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