Very Bright, Very Blue, and Very Red: JWST CAPERS Analysis of Highly Luminous Galaxies with Extreme Ultraviolet Slopes at z = 10
Callum T. Donnan; Mark Dickinson; Anthony J. Taylor; Pablo Arrabal Haro; Steven L. Finkelstein; T M Stanton; Intae Jung; Casey Papovich · 2025 · The Astrophysical Journal
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Abstract
Abstract We present JWST/NIRSpec PRISM observations of three luminous ( M UV < −20) galaxies at z ∼ 10 observed with the CANDELS-Area Prism Epoch of Reionization Survey (CAPERS) Cycle 3 program. These galaxies exhibit extreme UV slopes compared to typical galaxies at z = 10. Of the three sources, two of them are a close pair (0 . ″ 22) of blue galaxies at z = 9.800 ± 0.003 and z = 9.808 ± 0.002 with UV slopes of β = −2.87 ± 0.15 and β = −2.46 ± 0.10, respectively, selected from PRIMER COSMOS NIRCam imaging. We perform spectrophotometric modeling of the galaxies, which suggests extre
Abstract by Callum T. Donnan; Mark Dickinson; Anthony J. Taylor; Pablo Arrabal Haro; Steven L. Finkelstein; T M Stanton; Intae Jung; Casey Papovich, The Astrophysical Journal (2025) — licensed CC BY 4.0.
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Metadata source: OpenAlex · DOI 10.3847/1538-4357/ae0a1f