JADES NIRSpec Spectroscopy of GN-z11: Lyman- α emission and possible enhanced nitrogen abundance in a z = 10.60 luminous galaxy

We present JADES JWST/NIRSpec spectroscopy of GN-z11, the most luminous candidate z > 10 Lyman break galaxy in the GOODS-North field with M UV = −21.5. We derive a redshift of z = 10.603 (lower than previous determinations) based on multiple emission lines in our low and medium resolution spectra over 0.7 − 5.3 μm. We significantly detect the continuum and measure a blue rest-UV spectral slope of β = −2.4. Remarkably, we see spatially extended Lyman- α in emission (despite the highly neutral intergalactic medium expected at this early epoch), offset 555 km s −1 redwards of the systemic redshift. From our measurements of collisionally excited lines of both low and high ionisation (including [O II ] λ 3727,…

• NS
  National Science Foundation

  Award: 2137419
• JH
  Johns Hopkins University
• UO
  University of Arizona

  Awards: PID2021-127718NB-I00, NAS5-02015
• 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

  Award: Cosmic Dawn Center (DAWN) grant no. 140
• 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, STFC Ernest Rutherford Fellowship ST/S004831/1, STFC Ernest Rutherford Fellowship ST/T003596/1, ST/V000918/1, ST/T003596/1, ST/T003596/1, ST/X001229/1, CE170100013, ST/V00087X/1, ST/S004831/1, ST/S004831/1, STFC Webb Fellowship ST/W001438/1, 695671, ST/W001438/1
• AE
  Agencia Estatal de Investigación