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On the stellar populations of galaxies at z = 9-11: the growth of metals and stellar mass at early times

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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, others
We 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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Astrophysical Journal

ISSN

0004-637X

Publisher

American Astronomical Society

Issue

2

Volume

927

Page range

1-29

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2023-04-24

First Open Access (FOA) Date

2023-04-24

First Compliant Deposit (FCD) Date

2023-04-21

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