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A Near-Infrared Faint, Far-Infrared-Luminous Dusty Galaxy at z~5 in COSMOS-Web by McKinney, Jed; Manning, Sinclaire M.; Cooper, Olivia R.; Long, Arianna S.; Akins, Hollis; Casey, Caitlin M.; Faisst, Andreas L.; Franco, Maximilien; Hayward, Christopher C.; Lambrides, Erini; Magdis, Georgios; Whitaker, Katherine E.; Yun, Min; Champagne, Jaclyn B.; Drakos, Nicole E.; Gentile, Fabrizio; Gillman, Steven; Gozaliasl, Ghassem; Ilbert, Olivier; Jin, Shuowen; Koekemoer, Anton M.; Kokorev, Vasily; Liu, Daizhong; Rich, R. Michael; Robertson, Brant E.; Valentino, Francesco; Weaver, John R.; Zavala, Jorge A.; Allen, Natalie; Kartaltepe, Jeyhan S.; McCracken, Henry Joy; Paquereau, Louise; Rhodes, Jason; Shuntov, Marko; Toft, Sune is a scholarly article available to read on EtoBox.

What is A Near-Infrared Faint, Far-Infrared-Luminous Dusty Galaxy at z~5 in COSMOS-Web about?

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), com

Author

McKinney, Jed; Manning, Sinclaire M.; Cooper, Olivia R.; Long, Arianna S.; Akins, Hollis; Casey, Caitlin M.; Faisst, Andreas L.; Franco, Maximilien; Hayward, Christopher C.; Lambrides, Erini; Magdis, Georgios; Whitaker, Katherine E.; Yun, Min; Champagne, Jaclyn B.; Drakos, Nicole E.; Gentile, Fabrizio; Gillman, Steven; Gozaliasl, Ghassem; Ilbert, Olivier; Jin, Shuowen; Koekemoer, Anton M.; Kokorev, Vasily; Liu, Daizhong; Rich, R. Michael; Robertson, Brant E.; Valentino, Francesco; Weaver, John R.; Zavala, Jorge A.; Allen, Natalie; Kartaltepe, Jeyhan S.; McCracken, Henry Joy; Paquereau, Louise; Rhodes, Jason; Shuntov, Marko; Toft, Sune

Published

2023

Language

EN