The AURORA Survey: High-redshift Empirical Metallicity Calibrations from Electron Temperature Measurements at z = 2–10
Ryan L. Sanders; Alice E. Shapley; Michael W. Topping; Naveen A. Reddy; Danielle A. Berg; Ali Ahmad Khostovan; R. J. Bouwens; Gabriel Brammer · 2026 · The Astrophysical Journal
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Abstract
Abstract We present detections of auroral emission lines of [O iii ], [O ii ], [S iii ], and [S ii ] in deep JWST/NIRSpec spectroscopy for 41 star-forming galaxies at z = 1.4–7.2 from the AURORA survey. We combine these new observations with 98 star-forming galaxies at z = 1.3–10.6 with detected auroral lines drawn from the literature to form a sample of 139 high-redshift galaxies with robust electron temperature and direct-method oxygen abundance determinations. This sample notably covers a wider dynamic range in metallicity than previous work, spanning 0.02–0.9 Z ⊙ . We calibrate empirical r
Abstract by Ryan L. Sanders; Alice E. Shapley; Michael W. Topping; Naveen A. Reddy; Danielle A. Berg; Ali Ahmad Khostovan; R. J. Bouwens; Gabriel Brammer, The Astrophysical Journal (2026) — licensed CC BY 4.0.
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Metadata source: OpenAlex · DOI 10.3847/1538-4357/ae66e2