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
PY - 2023/10/10
Y1 - 2023/10/10
N2 - A growing number of far-infrared 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/NIRCam counterpart
from the COSMOS-Web survey to a far-infrared SCUBA-2 and ALMA source,
AzTECC71, which was previously undetected at wavelengths shorter than
850 microns. AzTECC71, amongst the reddest galaxies in COSMOS-Web with
F277W - F444W~0.9, is undetected in NIRCam/F150W and F115W and fainter
in F444W than other sub-millimeter 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 far-IR including ALMA Band 6, we find
a high probability (99%) that AzTECC71 is at z>4 with
z_phot=5.7(+0.8,-0.7). This galaxy is massive (logM*/Msun~10.7) and
IR-luminous (logLIR/Lsun~12.7), comparable to other optically-undetected
but far-IR 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 far-IR-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 ~3-10x greater than previously
estimated.
AB - A growing number of far-infrared 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/NIRCam counterpart
from the COSMOS-Web survey to a far-infrared SCUBA-2 and ALMA source,
AzTECC71, which was previously undetected at wavelengths shorter than
850 microns. AzTECC71, amongst the reddest galaxies in COSMOS-Web with
F277W - F444W~0.9, is undetected in NIRCam/F150W and F115W and fainter
in F444W than other sub-millimeter 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 far-IR including ALMA Band 6, we find
a high probability (99%) that AzTECC71 is at z>4 with
z_phot=5.7(+0.8,-0.7). This galaxy is massive (logM*/Msun~10.7) and
IR-luminous (logLIR/Lsun~12.7), comparable to other optically-undetected
but far-IR 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 far-IR-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 ~3-10x greater than previously
estimated.
KW - Astrophysics - Astrophysics of Galaxies
UR - http://www.scopus.com/inward/record.url?scp=85178951996&partnerID=8YFLogxK
U2 - 10.3847/1538-4357/acf614
DO - 10.3847/1538-4357/acf614
M3 - Article
SN - 1538-4357
VL - 956
JO - The Astrophysical Journal
JF - The Astrophysical Journal
IS - 2
M1 - acf614
ER -