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Spectroscopic confirmation of four metal-poor galaxies at z = 10.3–13.2

Curtis-Lake, E, Carniani, S, Cameron, A, Charlot, S, Jakobsen, P, Maiolino, R, Bunker, A, Witstok, J, Smit, R, Chevallard, J, Willott, C, Ferruit, P, Arribas, S, Bonaventura, N, Curti, M, D’Eugenio, F, Franx, M, Giardino, G, Looser, TJ, Lützgendorf, N , Maseda, MV, Rawle, T, Rix, HW, Rodríguez del Pino, B, Übler, H, Sirianni, M, Dressler, A, Egami, E, Eisenstein, DJ, Endsley, R, Hainline, K, Hausen, R, Johnson, BD, Rieke, M, Robertson, B, Shivaei, I, Stark, DP, Tacchella, S, Williams, CC, Willmer, CNA, Bhatawdekar, R, Bowler, R, Boyett, K, Chen, Z, de Graaff, A, Helton, JM, Hviding, RE, Jones, GC, Kumari, N, Lyu, J, Nelson, E, Perna, M, Sandles, L, Saxena, A, Suess, KA, Sun, F, Topping, MW, Wallace, IEB and Whitler, L (2023) Spectroscopic confirmation of four metal-poor galaxies at z = 10.3–13.2. Nature Astronomy, 7 (5). pp. 622-632. ISSN 2397-3366

Spectroscopic confirmation of four metal-poor galaxies at z=10.3-13.2.pdf - Accepted Version

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Finding and characterizing the first galaxies that illuminated the early universe at cosmic dawn is pivotal to understand the physical conditions and the processes that led to the formation of the first stars. In the first few months of operations, imaging from the James Webb Space Telescope (JWST) has been used to identify tens of candidates of galaxies at redshift (z) greater than 10, less than 450 million years after the Big Bang. However, none of such candidates has yet been confirmed spectroscopically, leaving open the possibility that they are actually low-redshift interlopers. Here we present spectroscopic confirmation and analysis of four galaxies unambiguously detected at redshift 10.3 ≤ z ≤ 13.2, previously selected from JWST Near Infrared Camera imaging. The spectra reveal that these primeval galaxies are metal poor, have masses on the order of about 107–108 solar masses and young ages. The damping wings that shape the continuum close to the Lyman edge provide constraints on the neutral hydrogen fraction of the intergalactic medium from normal star-forming galaxies. These findings demonstrate the rapid emergence of the first generations of galaxies at cosmic dawn.

Item Type: Article
Additional Information: This is a post-peer-review, precopyedit version of an article published in Nature Astronomy. The final authenticated version is available online at: http://dx.doi.org/10.1038/s41550-023-01918-w
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Nature Research
SWORD Depositor: A Symplectic
Date Deposited: 16 Jun 2023 12:28
Last Modified: 04 Oct 2023 00:50
DOI or ID number: 10.1038/s41550-023-01918-w
URI: https://researchonline.ljmu.ac.uk/id/eprint/19885
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