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Where Galaxies Go to Die: The Environments of Massive Quiescent Galaxies at 3 < z < 5

Authors: Ian McConachie, Anna de Graaff, Michael V. Maseda, Joel Leja, Yunchong Zhang, David J. Setton, Rachel Bezanson, Leindert A. Boogaard, Gabriel Brammer, Nikko J. Cleri, Olivia R. Cooper, Karl Glazebrook, Rashmi Gottumukkala, Jenny E. Greene, Andy D. Goulding, Michaela Hirschmann, Gourav Khullar, Ivo Labbe, Zach Lewis, Jorryt Matthee, Tim B. Miller, Rohan P. Naidu, Themiya Nanayakkara, Erica J. Nelson, Pascal A. Oesch, Sedona H. Price, Katherine A. Suess, Bingjie Wang, Katherine E. Whitaker, Christina C. Williams

Ian McConachie et al 2026 The Astrophysical Journal 1011 .

Provider: AAS Journals

Caption: Figure A2.

Eight NIRSpec spectra (black) and best-fit Prospector models for galaxies with ﹩\mathrm{log}({M}_{* }/{M}_{\odot })\,\geqslant \,10.5﹩, τ_dust ≥ 1.5, and either ﹩\mathrm{log}({\rm{sSFR}}/{{\rm{yr}}}^{-1})\lt -10﹩ (red) or ﹩\mathrm{log}({{\rm{sSFR}}}_{16}/{{\rm{yr}}}^{-1})\lt -10﹩ (pink). Unlike Figures 1 and A1, here we leave the spectra uncalibrated and show the model spectrum scaled to the observed instead. Based on their high dust optical depths, we classify them as “dusty star-forming galaxies” by default, though classifying them as quiescent leaves our conclusions unchanged.

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