Connecting Environment, Star Formation History, and Morphology of Massive Quiescent Galaxies at 3 < z < 4 with JWST
Lalitwadee Kawinwanichakij; Karl Glazebrook; Themiya Nanayakkara; Glenn G. Kacprzak; Harry George Chittenden; Colin Jacobs; Ángel Chandro-Gómez; Claudia Lagos · 2026 · The Astrophysical Journal
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Abstract
Abstract We present the morphological properties of 17 spectroscopically confirmed massive quiescent galaxies ( 10.2 < log ( M * / M ⊙ ) < 11.2 ) at 3.0 < z < 4.3, observed with JWST/NIRSpec and NIRCam. Using Sérsic profile fits to F277W and F444W imaging, we derive the size–mass relation and find typical sizes of ∼0.6–0.8 kpc at M * = 5 × 10 10 M ⊙ , consistent with ∼7× growth from z ∼ 4 to the present, including ∼2× by z ∼ 2. We find tentative evidence that formation history and morphology jointly influence galaxy sizes: late-forming bulge-dominated galaxies appear more compact by ∼0.2–0.3 d
Abstract by Lalitwadee Kawinwanichakij; Karl Glazebrook; Themiya Nanayakkara; Glenn G. Kacprzak; Harry George Chittenden; Colin Jacobs; Ángel Chandro-Gómez; Claudia Lagos, The Astrophysical Journal (2026) — licensed CC BY 4.0.
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Metadata source: OpenAlex · DOI 10.3847/1538-4357/ae0a18