TY - JOUR
T1 - EPOCHS. I. The Discovery and Star-forming Properties of Galaxies in the Epoch of Reionization at 6.5 < z < 18 with PEARLS and Public JWST Data
AU - Conselice, Christopher J.
AU - Adams, Nathan
AU - Harvey, Thomas
AU - Austin, Duncan
AU - Ferreira, Leonardo
AU - Ormerod, Katherine
AU - Duan, Qiao
AU - Trussler, James
AU - Li, Qiong
AU - Juodzbalis, Ignas
AU - Westcott, Lewi
AU - Harris, Honor
AU - Seeyave, Louise T. C.
AU - Bluck, Asa F. L.
AU - Windhorst, Rogier A.
AU - Bhatawdekar, Rachana
AU - Coe, Dan
AU - Cohen, Seth H.
AU - Cheng, Cheng
AU - Driver, Simon P.
AU - Frye, Brenda
AU - Furtak, Lukas J.
AU - Grogin, Norman A.
AU - Hathi, Nimish P.
AU - Holwerda, Benne W.
AU - Jansen, Rolf A.
AU - Koekemoer, Anton M.
AU - Marshall, Madeline A.
AU - Nonino, Mario
AU - Robotham, Aaron
AU - Summers, Jake
AU - Wilkins, Stephen M.
AU - Willmer, Christopher N. A.
AU - Yan, Haojing
AU - Zitrin, Adi
PY - 2025/4/10
Y1 - 2025/4/10
N2 - We present in this paper the discovery, properties, and a catalog of 1165 high-redshift 6.5 < z < 18 galaxies found in deep JWST NIRCam imaging from the GTO PEARLS survey combined with data from JWST public fields. We describe our bespoke homogeneous reduction process and our analysis of these areas including the NEP, CEERS, GLASS, NGDEEP, JADES, and ERO SMACS-0723 fields with over 214 arcmin2 imaged to depths of similar to 30 mag. We describe our rigorous methods for identifying these galaxies, involving the use of Lyman-break strength, detection significance criteria, visual inspection, and integrated photometric redshift probability distributions predominately at high redshift. Our sample is a robust and highly pure collection of distant galaxies from which we also remove brown dwarf stars, and calculate completeness and contamination from simulations. We include a summary of the basic properties of these z > 6.5 galaxies, including their redshift distributions, UV absolute magnitudes, and star formation rates. Our study of these young galaxies reveals a wide range of stellar population properties as seen in their colors and SED fits, which we compare to stellar population models, indicating a range of star formation histories (SFHs), dust, active galactic nuceli, and/or nebular emission. We find that a strong trend exists between stellar mass and (U - V) color, as well as the existence of the "main-sequence" of star formation for galaxies as early as z similar to 12. This indicates that stellar mass, or an underlying variable correlating with stellar mass, is driving galaxy formation, in agreement with simulation predictions. We also discover ultra-high-redshift candidates at z > 12 in our sample and describe their properties. Finally, we note a significant observed excess of galaxies compared to models at z > 12, revealing a tension between predictions and our observations.
AB - We present in this paper the discovery, properties, and a catalog of 1165 high-redshift 6.5 < z < 18 galaxies found in deep JWST NIRCam imaging from the GTO PEARLS survey combined with data from JWST public fields. We describe our bespoke homogeneous reduction process and our analysis of these areas including the NEP, CEERS, GLASS, NGDEEP, JADES, and ERO SMACS-0723 fields with over 214 arcmin2 imaged to depths of similar to 30 mag. We describe our rigorous methods for identifying these galaxies, involving the use of Lyman-break strength, detection significance criteria, visual inspection, and integrated photometric redshift probability distributions predominately at high redshift. Our sample is a robust and highly pure collection of distant galaxies from which we also remove brown dwarf stars, and calculate completeness and contamination from simulations. We include a summary of the basic properties of these z > 6.5 galaxies, including their redshift distributions, UV absolute magnitudes, and star formation rates. Our study of these young galaxies reveals a wide range of stellar population properties as seen in their colors and SED fits, which we compare to stellar population models, indicating a range of star formation histories (SFHs), dust, active galactic nuceli, and/or nebular emission. We find that a strong trend exists between stellar mass and (U - V) color, as well as the existence of the "main-sequence" of star formation for galaxies as early as z similar to 12. This indicates that stellar mass, or an underlying variable correlating with stellar mass, is driving galaxy formation, in agreement with simulation predictions. We also discover ultra-high-redshift candidates at z > 12 in our sample and describe their properties. Finally, we note a significant observed excess of galaxies compared to models at z > 12, revealing a tension between predictions and our observations.
KW - Ultra deep field
KW - Less-than 12
KW - Hubble frontier fields
KW - To 10 galaxy
KW - Luminosity function
KW - Stellar mass
KW - Space-telescope
KW - Main-sequence
KW - Simulations flares
KW - Formation history
UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=uwapure5-25&SrcAuth=WosAPI&KeyUT=WOS:001458413500001&DestLinkType=FullRecord&DestApp=WOS_CPL
U2 - 10.3847/1538-4357/ada608
DO - 10.3847/1538-4357/ada608
M3 - Article
SN - 0004-637X
VL - 983
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 30
ER -