High-redshift Galaxy Candidates at z = 9-10 as Revealed by JWST Observations of WHL0137-08
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Bradley, Larry D.; Coe, Dan; Brammer, Gabriel; Furtak, Lukas J.; Larson, Rebecca L.; Kokorev, Vasily; Andrade-Santos, Felipe; Bhatawdekar, Rachana; Brada, Maruša; Broadhurst, Tom; Carnall, Adam; Conselice, Christopher J.; Diego Rodríguez, José María; Frye, Brenda; Fujimoto, Seiji; Hsiao, Tiger Y.-Y; Hutchison, Taylor A.; Jung, Intae; Mahler, Guillaume; [et al.]Fecha
2023Derechos
Attribution 4.0 International
Publicado en
Astrophysical Journal, 2023, 955(13)
Editorial
Institute of Physics Publishing
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Resumen/Abstract
We report the discovery of four galaxy candidates observed 450–600 Myr after the Big Bang with photometric redshifts between z ∼ 8.3 and 10.2 measured using James Webb Space Telescope (JWST) NIRCam imaging of the galaxy cluster WHL0137−08 observed in eight filters spanning 0.8–5.0 μm, plus nine Hubble Space Telescope filters spanning 0.4–1.7 μm. One candidate is gravitationally lensed with a magnification of μ ∼ 8, while the other three are located in a nearby NIRCam module with expected magnifications of μ 1.1. Using SED fitting, we estimate the stellar masses of these galaxies are typically in the range log M M = 8.3–8.7. All appear young, with mass-weighted ages < 0.15 mag, and specific star formation rates sSFR ∼0.25–10 Gyr−1 for most. One z ∼ 9 candidate is consistent with an age
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