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

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,…

• NS
  National Science Foundation

  Awards: DGE-1746060, DGE-2137419, 1746060, AST 1828315, 2137419, 1828315
• UO
  University of California, Santa Cruz

  Award: 1828315
• JH
  Johns Hopkins University
• CD
  Comunidad de Madrid

  Award: 2018-T2/TIC-11715
• EC
  European Commission

  Awards: ST/W001438/1, 789056, 695671, 101040227
• NR
  National Research Foundation
• DG
  Danmarks Grundforskningsfond
• LJ
  Liverpool John Moores University
• IN
  Isaac Newton Trust
• MD
  Ministerio de Ciencia e Innovación

  Award: PID2021-127718NB-I00
• FM
  Fondation Merac
• SA
  Science and Technology Facilities Council

  Awards: ST/W001438/1, PID2021-127718NB-I00, NAS5-02015, ST/T003596/1, ST/T003596/1, ST/X001229/1, CE170100013, ST/V00087X/1, ST/S004831/1, ST/S004831/1, 695671, ST/W001438/1
• AE
  Agencia Estatal de Investigación