Tacchella_2022_ApJ_927_170.pdf (7.93 MB)
On the stellar populations of galaxies at z = 9-11: the growth of metals and stellar mass at early times
journal contribution
posted on 2023-06-10, 06:52 authored by Sandro Tacchella, Steven L Finkelstein, Micaela Bagley, Mark Dickinson, Henry C Ferguson, Mauro Giavalisco, Luca Graziani, Norman A Grogin, Namish Hathi, Taylor A Hutchison, Intae Jung, Anton M Koekemoer, Rebecca L Larson, Stephen WilkinsStephen Wilkins, othersWe present a detailed stellar population analysis of 11 bright (H < 26.6) galaxies at z = 9-11 (three spectroscopically confirmed) to constrain the chemical enrichment and growth of stellar mass of early galaxies. We use the flexible Bayesian spectral energy distribution (SED) fitting code Prospector with a range of star formation histories (SFHs), a flexible dust attenuation law, and a self-consistent model of emission lines. This approach allows us to assess how different priors affect our results and how well we can break degeneracies between dust attenuation, stellar ages, metallicity, and emission lines using data that probe only the rest-frame ultraviolet (UV) to optical wavelengths. We measure a median observed UV spectral slope ß=-1.87-0.43+0.35 for relatively massive star-forming galaxies ( 9 10.
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- Published
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- Published version
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Astrophysical JournalISSN
0004-637XPublisher
American Astronomical SocietyExternal DOI
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2Volume
927Page range
1-29Department affiliated with
- Physics and Astronomy Publications
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- Yes
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- Yes
Legacy Posted Date
2023-04-24First Open Access (FOA) Date
2023-04-24First Compliant Deposit (FCD) Date
2023-04-21Usage metrics
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