Kavli Affiliate: Roberto Maiolino
| First 5 Authors: Kevin N. Hainline, Benjamin D. Johnson, Brant Robertson, Sandro Tacchella, Jakob M. Helton
| Summary:
We present a catalog of 717 candidate galaxies at $z > 8$ selected from 125
square arcminutes of NIRCam imaging as part of the JWST Advanced Deep
Extragalactic Survey (JADES). We combine the full JADES imaging dataset with
data from the JEMS and FRESCO JWST surveys along with extremely deep existing
observations from HST/ACS for a final filter set that includes fifteen
JWST/NIRCam filters and five HST/ACS filters. The high-redshift galaxy
candidates were selected from their estimated photometric redshifts calculated
using a template fitting approach, followed by visual inspection from seven
independent reviewers. We explore these candidates in detail, highlighting
interesting resolved or extended sources, sources with very red long-wavelength
slopes, and our highest redshift candidates, which extend to $z_{phot} = 18$.
We also investigate potential contamination by stellar objects, and do not find
strong evidence from SED fitting that these faint high-redshift galaxy
candidates are low-mass stars. Over 93% of the sources are newly identified
from our deep JADES imaging, including 31 new galaxy candidates at $z_{phot} >
12$. Using 42 sources in our sample with measured spectroscopic redshifts from
NIRSpec and FRESCO, we find excellent agreement to our photometric redshift
estimates, with no catastrophic outliers and an average difference of $langle
Delta z = z_{phot}- z_{spec} rangle= 0.26$. These sources comprise one of the
most robust samples for probing the early buildup of galaxies within the first
few hundred million years of the Universe’s history.
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