• Corpus ID: 251554850

The Direct-Method Oxygen Abundance of Typical Dwarf Galaxies at Cosmic High-Noon

  title={The Direct-Method Oxygen Abundance of Typical Dwarf Galaxies at Cosmic High-Noon},
  author={Timothy Gburek and Brian D. Siana and Anahita Alavi and Najmeh Emami and Johan Richard and William Robert Freeman and Daniel P. Stark and Christopher Snapp-Kolas University of California-Riverside and IPAC-Caltech and University of Minnesota Twin Cities and CRAL-Lyon and Steward Observatory University of Arizona},
We present a Keck/MOSFIRE, rest-optical, composite spectrum of 16 typical, gravitationally-lensed, star-forming, dwarf galaxies at 1 . 7 (cid:46) z (cid:46) 2 . 6 ( z mean = 2 . 30), all chosen independent of emission-line strength. These galaxies have a median stellar mass of log( M ∗ /M (cid:12) ) med = 8.29 and a median star formation rate of SFR medH α = 2 . 25 M (cid:12) yr − 1 . We measure the faint, electron-temperature-sensitive, [O III ] λ 4363 emission line at 2 . 5 σ (4 . 1 σ ) signi… 

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