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The AURORA Survey: The Mass–Metallicity and Fundamental Metallicity Relations at z ∼ 2.3 Based Purely on Direct Te Metallicities

  • Authors: Ali Ahmad Khostovan, Ryan L. Sanders, Alice E. Shapley, Michael W. Topping, Naveen A. Reddy, Alex M. Garcia, Danielle A. Berg, Leonardo Clarke, Fergus Cullen, Richard S. Ellis, N. M. Förster Schreiber, Karl Glazebrook, Tucker Jones, Derek J. McLeod, Anthony J. Pahl, Max Pettini, Paul Torrey

Ali Ahmad Khostovan et al 2026 The Astrophysical Journal Letters 1003 .

  • Provider: AAS Journals

Caption: Figure 2.

Mass–metallicity relation for AURORA galaxies at z ∼ 2.3 using only direct Te metallicities. Open circles show individual galaxies color-coded based on whether [O III]4363 Å-only, [O II]7320,7331 Å-only, or both oxygen auroral lines were detected. Our best-fit model (blue solid line) is shown along with the best-fit parameters, and the darker (lighter) shading corresponds to the 1σ (2σ) confidence regions. Weighted mean values for equally populated stellar mass bins are shown for visualization purposes but not used in fitting.

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