CEERS Key Paper. I. An Early Look into the First 500 Myr of Galaxy Formation with JWST - Sorbonne Université Access content directly
Journal Articles The Astrophysical journal letters Year : 2023

CEERS Key Paper. I. An Early Look into the First 500 Myr of Galaxy Formation with JWST

Steven L. Finkelstein
  • Function : Author
Micaela B. Bagley
  • Function : Author
Henry C. Ferguson
  • Function : Author
Stephen M. Wilkins
  • Function : Author
Jeyhan S. Kartaltepe
  • Function : Author
Casey Papovich
  • Function : Author
L. Y. Aaron Yung
  • Function : Author
Pablo Arrabal Haro
  • Function : Author
Peter Behroozi
  • Function : Author
Mark Dickinson
  • Function : Author
Dale D. Kocevski
  • Function : Author
Anton M. Koekemoer
  • Function : Author
Rebecca L. Larson
  • Function : Author
Aurélien Le Bail
  • Function : Author
Alexa M. Morales
  • Function : Author
Pablo G. Pérez-González
  • Function : Author
Romeel Davé
  • Function : Author
Michaela Hirschmann
  • Function : Author
Rachel S. Somerville
  • Function : Author
Stijn Wuyts
  • Function : Author
Volker Bromm
  • Function : Author
Caitlin M. Casey
  • Function : Author
Adriano Fontana
  • Function : Author
Seiji Fujimoto
  • Function : Author
Jonathan P. Gardner
  • Function : Author
Mauro Giavalisco
  • Function : Author
Andrea Grazian
  • Function : Author
Norman A. Grogin
  • Function : Author
Nimish P. Hathi
  • Function : Author
Taylor A. Hutchison
  • Function : Author
Saurabh W. Jha
  • Function : Author
Shardha Jogee
  • Function : Author
Lisa J. Kewley
  • Function : Author
Allison Kirkpatrick
  • Function : Author
Arianna S. Long
  • Function : Author
Jennifer M. Lotz
  • Function : Author
Laura Pentericci
  • Function : Author
Justin D. R. Pierel
  • Function : Author
Nor Pirzkal
  • Function : Author
Swara Ravindranath
  • Function : Author
Russell E. Ryan
  • Function : Author
Jonathan R. Trump
  • Function : Author
Guang Yang
  • Function : Author
Rachana Bhatawdekar
  • Function : Author
Laura Bisigello
  • Function : Author
Antonello Calabrò
  • Function : Author
Marco Castellano
  • Function : Author
Nikko J. Cleri
  • Function : Author
M. C. Cooper
  • Function : Author
Darren Croton
  • Function : Author
Emanuele Daddi
  • Function : Author
Avishai Dekel
  • Function : Author
David Elbaz
  • Function : Author
Maximilien Franco
  • Function : Author
Eric Gawiser
  • Function : Author
Benne W. Holwerda
  • Function : Author
Anne E. Jaskot
  • Function : Author
Gene C. K. Leung
  • Function : Author
Ray A. Lucas
  • Function : Author
Bahram Mobasher
  • Function : Author
Viraj Pandya
  • Function : Author
Sandro Tacchella
  • Function : Author
Benjamin J. Weiner
  • Function : Author
Jorge A. Zavala
  • Function : Author

Abstract

We present an investigation into the first 500 Myr of galaxy evolution from the Cosmic Evolution Early Release Science (CEERS) survey. CEERS, one of 13 JWST ERS programs, targets galaxy formation from z ~ 0.5 to >10 using several imaging and spectroscopic modes. We make use of the first epoch of CEERS NIRCam imaging, spanning 35.5 arcmin2, to search for candidate galaxies at z > 9. Following a detailed data reduction process implementing several custom steps to produce high-quality reduced images, we perform multiband photometry across seven NIRCam broad- and medium-band (and six Hubble broadband) filters focusing on robust colors and accurate total fluxes. We measure photometric redshifts and devise a robust set of selection criteria to identify a sample of 26 galaxy candidates at z ~ 9-16. These objects are compact with a median half-light radius of ~0.5 kpc. We present an early estimate of the z ~ 11 rest-frame ultraviolet (UV) luminosity function, finding that the number density of galaxies at M UV ~ -20 appears to evolve very little from z ~ 9 to 11. We also find that the abundance (surface density [arcmin-2]) of our candidates exceeds nearly all theoretical predictions. We explore potential implications, including that at z > 10, star formation may be dominated by top-heavy initial mass functions, which would result in an increased ratio of UV light per unit halo mass, though a complete lack of dust attenuation and/or changing star formation physics may also play a role. While spectroscopic confirmation of these sources is urgently required, our results suggest that the deeper views to come with JWST should yield prolific samples of ultrahigh-redshift galaxies with which to further explore these conclusions.
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Dates and versions

insu-04479099 , version 1 (03-03-2024)

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Steven L. Finkelstein, Micaela B. Bagley, Henry C. Ferguson, Stephen M. Wilkins, Jeyhan S. Kartaltepe, et al.. CEERS Key Paper. I. An Early Look into the First 500 Myr of Galaxy Formation with JWST. The Astrophysical journal letters, 2023, 946, ⟨10.3847/2041-8213/acade4⟩. ⟨insu-04479099⟩
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