JADES: Insights into the low-mass end of the mass–metallicity–SFR relation at 3 < z < 10 from deep JWST/NIRSpec spectroscopy

We analysed the gas-phase metallicity properties of a sample of low-stellar-mass (log M ⋆ / M ⊙ ≲ 9) galaxies at 3 < z < 10 observed with JWST/NIRSpec as part of the JADES programme in its deep GOODS-S tier. By combining this sample with more massive galaxies at similar redshifts from other programmes, we study the scaling relations between stellar mass ( M ⋆ ), oxygen abundance (O/H), and star-formation rate (SFR) for 146 galaxies spanning three orders of magnitude in stellar mass and out to the epoch of early galaxy assembly. We find evidence for a shallower slope at the low-mass end of the mass–metallicity relation (MZR), with 12+log(O/H) = (7.72 ± 0.02) + (0.17 ± 0.03) log( M ⋆ /10 8 M ⊙ ), in good…

• NS
  National Science Foundation
• NA
  National Aeronautics and Space Administration

  Awards: 5-03127, NAS 5-03127, NAS5-02015
• JH
  Johns Hopkins University
• ST
  Space Telescope Science Institute

  Awards: NAS5-02015, 5-03127, NAS 5-03127
• EC
  European Commission

  Awards: ST/W001438/1, 789056, 695671, 101040227
• 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, CE170100013, ST/V00087X/1, ST/S004831/1, ST/S004831/1, 695671, ST/W001438/1
• AE
  Agencia Estatal de Investigación