articleThe Astrophysical JournalJul 1, 2024GOLD OA

Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic Star Formation Rate Density 300 Myr after the Big Bang

BRBrant RobertsonBDBenjamin D. JohnsonSTSandro TacchellaDJDaniel J. EisensteinKHKevin Hainline

University of California, Santa Cruz · Center for Astrophysics Harvard & Smithsonian · +18 more institutions

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Abstract

Abstract We characterize the earliest galaxy population in the JADES Origins Field, the deepest imaging field observed with JWST. We make use of ancillary Hubble Space Telescope optical images (five filters spanning 0.4–0.9 μ m) and novel JWST images with 14 filters spanning 0.8−5 μ m, including seven medium-band filters, and reaching total exposure times of up to 46 hr per filter. We combine all our data at >2.3 μ m to construct an ultradeep image, reaching as deep as ≈31.4 AB mag in the stack and 30.3–31.0 AB mag (5 σ , r = 0.″1 circular aperture) in individual filters. We measure photometric redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts z =…

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Topics & keywords

Topics
Keywords
  • Physics
  • Redshift
  • Astrophysics
  • Galaxy
  • Luminosity function
  • Hubble Ultra-Deep Field
  • Astronomy
  • Photometry (optics)
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