The eventful life of a luminous galaxy at z  = 14: metal enrichment, feedback, and low gas fraction?

JADES-GS-z14-0 is the most distant spectroscopically confirmed galaxy yet, at z ≳14. With a UV magnitude of –20.81, it is one of the most luminous galaxies at cosmic dawn and its half-light radius of 260 pc means that stars dominate the observed UV emission. We report the Atacama Large Millimeter/submillimeter Array (ALMA) detection of [O III ]88 μm line emission with a significance of 6.67 σ and at a frequency of 223.524 GHz, corresponding to a redshift of 14.1796±0.0007, which is consistent with the candidate C III ] line detected in the NIRSpec spectrum. At this spectroscopic redshift, the Lyman- α break identified with NIRSpec requires a damped Lyman- α absorber with a column density of log( N HI /cm −2 )…

• NS
  National Science Foundation

  Awards: AST 1828315, 1828315
• UO
  University of California, Santa Cruz

  Award: 1828315
• UR
  UK Research and Innovation

  Award: 101040227
• NR
  National Radio Astronomy Observatory
• EC
  European Commission

  Awards: 789056, 695671, 101040227
• NR
  National Research Foundation
• DG
  Danmarks Grundforskningsfond
• NS
  National Science Council
• IN
  Isaac Newton Trust
• NA
  National Astronomical Observatory of Japan
• SA
  Science and Technology Facilities Council

  Awards: NAS5-02015, 695671
• NI
  National Institutes of Natural Sciences