TY - JOUR
T1 - A Near-infrared-faint, Far-infrared-luminous Dusty Galaxy at z ∼ 5 in COSMOS-Web
AU - McKinney, Jed
AU - Manning, Sinclaire M.
AU - Cooper, Olivia R.
AU - Long, Arianna S.
AU - Akins, Hollis
AU - Casey, Caitlin M.
AU - Faisst, Andreas L.
AU - Franco, Maximilien
AU - Hayward, Christopher C.
AU - Lambrides, Erini
AU - Magdis, Georgios
AU - Whitaker, Katherine E.
AU - Yun, Min
AU - Champagne, Jaclyn B.
AU - Drakos, Nicole E.
AU - Gentile, Fabrizio
AU - Gillman, Steven
AU - Gozaliasl, Ghassem
AU - Ilbert, Olivier
AU - Jin, Shuowen
AU - Koekemoer, Anton M.
AU - Kokorev, Vasily
AU - Liu, Daizhong
AU - Rich, R. Michael
AU - Robertson, Brant E.
AU - Valentino, Francesco
AU - Weaver, John R.
AU - Zavala, Jorge A.
AU - Allen, Natalie
AU - Kartaltepe, Jeyhan S.
AU - McCracken, Henry Joy
AU - Paquereau, Louise
AU - Rhodes, Jason
AU - Shuntov, Marko
AU - Toft, Sune
N1 - Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/10/1
Y1 - 2023/10/1
N2 - A growing number of far-infrared (FIR) bright sources completely invisible in deep extragalactic optical surveys hint at an elusive population of z > 4 dusty, star-forming galaxies. Cycle 1 JWST surveys are now detecting their rest-frame optical light, which provides key insight into their stellar properties and statistical constraints on the population as a whole. This work presents the JWST Near Infrared Camera (NIRCam) counterpart from the COSMOS-Web survey to an FIR SCUBA-2 and Atacama Large Millimeter/submillimeter Array (ALMA) source, AzTECC71, which was previously undetected at wavelengths shorter than 850 μm. AzTECC71, among the reddest galaxies in COSMOS-Web with F277W − F444W ∼ 0.9, is undetected in NIRCam/F150W and F115W and fainter in F444W than other submillimeter galaxies identified in COSMOS-Web by 2-4 magnitudes. This is consistent with the system having both a lower stellar mass and higher redshift than the median dusty, star-forming galaxy. With deep ground- and space-based upper limits combined with detections in F277W, F444W, and the FIR including ALMA Band 6, we find a high probability (99%) that AzTECC71 is at z > 4 with z phot = 5.7 − 0.7 + 0.8 . This galaxy is massive ( log M * / M ⊙ ∼ 10.7 ) and infrared-luminous ( log L IR / L ⊙ ∼ 12.7 ), comparable to other optically undetected but FIR-bright dusty, star-forming galaxies at z > 4. This population of luminous, infrared galaxies at z > 4 is largely unconstrained but comprises an important bridge between the most extreme dust-obscured galaxies and more typical high-redshift star-forming galaxies. If further FIR-selected galaxies that drop out of the F150W filter in COSMOS-Web have redshifts z > 4 like AzTECC71, then the volume density of such sources may be ∼3-10 × greater than previously estimated.
AB - A growing number of far-infrared (FIR) bright sources completely invisible in deep extragalactic optical surveys hint at an elusive population of z > 4 dusty, star-forming galaxies. Cycle 1 JWST surveys are now detecting their rest-frame optical light, which provides key insight into their stellar properties and statistical constraints on the population as a whole. This work presents the JWST Near Infrared Camera (NIRCam) counterpart from the COSMOS-Web survey to an FIR SCUBA-2 and Atacama Large Millimeter/submillimeter Array (ALMA) source, AzTECC71, which was previously undetected at wavelengths shorter than 850 μm. AzTECC71, among the reddest galaxies in COSMOS-Web with F277W − F444W ∼ 0.9, is undetected in NIRCam/F150W and F115W and fainter in F444W than other submillimeter galaxies identified in COSMOS-Web by 2-4 magnitudes. This is consistent with the system having both a lower stellar mass and higher redshift than the median dusty, star-forming galaxy. With deep ground- and space-based upper limits combined with detections in F277W, F444W, and the FIR including ALMA Band 6, we find a high probability (99%) that AzTECC71 is at z > 4 with z phot = 5.7 − 0.7 + 0.8 . This galaxy is massive ( log M * / M ⊙ ∼ 10.7 ) and infrared-luminous ( log L IR / L ⊙ ∼ 12.7 ), comparable to other optically undetected but FIR-bright dusty, star-forming galaxies at z > 4. This population of luminous, infrared galaxies at z > 4 is largely unconstrained but comprises an important bridge between the most extreme dust-obscured galaxies and more typical high-redshift star-forming galaxies. If further FIR-selected galaxies that drop out of the F150W filter in COSMOS-Web have redshifts z > 4 like AzTECC71, then the volume density of such sources may be ∼3-10 × greater than previously estimated.
UR - https://www.scopus.com/pages/publications/85178951996
U2 - 10.3847/1538-4357/acf614
DO - 10.3847/1538-4357/acf614
M3 - Article
AN - SCOPUS:85178951996
SN - 0004-637X
VL - 956
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 72
ER -