TY - JOUR
T1 - JWST’s PEARLS
T2 - A JWST/NIRCam View of ALMA Sources
AU - Cheng, Cheng
AU - Huang, Jia Sheng
AU - Smail, Ian
AU - Yan, Haojing
AU - Cohen, Seth H.
AU - Jansen, Rolf A.
AU - Windhorst, Rogier A.
AU - Ma, Zhiyuan
AU - Koekemoer, Anton
AU - Willmer, Christopher N.A.
AU - Willner, S. P.
AU - Diego, Jose M.
AU - Frye, Brenda
AU - Conselice, Christopher J.
AU - Ferreira, Leonardo
AU - Petric, Andreea
AU - Yun, Min
AU - Gim, Hansung B.
AU - Polletta, Maria del Carmen
AU - Duncan, Kenneth J.
AU - Holwerda, Benne W.
AU - Röttgering, Huub J.A.
AU - Honor, Rachel
AU - Hathi, Nimish P.
AU - Kamieneski, Patrick S.
AU - Adams, Nathan J.
AU - Coe, Dan
AU - Broadhurst, Tom
AU - Summers, Jake
AU - Tompkins, Scott
AU - Driver, Simon P.
AU - Grogin, Norman A.
AU - Marshall, Madeline A.
AU - Pirzkal, Nor
AU - Robotham, Aaron
AU - Ryan, Russell E.
N1 - Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/1/1
Y1 - 2023/1/1
N2 - We report the results of James Webb Space Telescope/NIRCam observations of 19 (sub)millimeter sources detected by the Atacama Large Millimeter Array (ALMA). The accurate ALMA positions allowed unambiguous identifications of their NIRCam counterparts. Taking gravitational lensing into account, these represent 16 distinct galaxies in three fields and constitute the largest sample of its kind to date. The counterparts’ spectral energy distributions cover from rest-frame ultraviolet to near-IR and provide photometric redshifts (1 < z < 4.5) and stellar masses (M * > 1010.5 M ⊙), which are similar to submillimeter galaxies (SMGs) studied previously. However, our sample is fainter in (sub)millimeter than the classic SMG samples are, and our sources exhibit a wider range of properties. They have dust-embedded star formation rates as low as 10 M ⊙ yr−1, and the sources populate both the star-forming main sequence and the quiescent categories. The deep NIRCam data allow us to study the rest-frame near-IR morphologies. Excluding two multiply imaged systems and one quasar, the majority of the remaining sources are disk-like and show either little or no disturbance. This suggests that secular growth is a potential route for the assembly of high-mass disk galaxies. While a few objects have large disks, the majority have small disks (median half-mass radius of 1.6 kpc). At this time, it is unclear whether this is due to the prevalence of small disks at these redshifts or some unknown selection effects of deep ALMA observations. A larger sample of ALMA sources with NIRCam observations will be able to address this question.
AB - We report the results of James Webb Space Telescope/NIRCam observations of 19 (sub)millimeter sources detected by the Atacama Large Millimeter Array (ALMA). The accurate ALMA positions allowed unambiguous identifications of their NIRCam counterparts. Taking gravitational lensing into account, these represent 16 distinct galaxies in three fields and constitute the largest sample of its kind to date. The counterparts’ spectral energy distributions cover from rest-frame ultraviolet to near-IR and provide photometric redshifts (1 < z < 4.5) and stellar masses (M * > 1010.5 M ⊙), which are similar to submillimeter galaxies (SMGs) studied previously. However, our sample is fainter in (sub)millimeter than the classic SMG samples are, and our sources exhibit a wider range of properties. They have dust-embedded star formation rates as low as 10 M ⊙ yr−1, and the sources populate both the star-forming main sequence and the quiescent categories. The deep NIRCam data allow us to study the rest-frame near-IR morphologies. Excluding two multiply imaged systems and one quasar, the majority of the remaining sources are disk-like and show either little or no disturbance. This suggests that secular growth is a potential route for the assembly of high-mass disk galaxies. While a few objects have large disks, the majority have small disks (median half-mass radius of 1.6 kpc). At this time, it is unclear whether this is due to the prevalence of small disks at these redshifts or some unknown selection effects of deep ALMA observations. A larger sample of ALMA sources with NIRCam observations will be able to address this question.
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U2 - 10.3847/2041-8213/aca9d0
DO - 10.3847/2041-8213/aca9d0
M3 - Article
AN - SCOPUS:85146179829
SN - 2041-8205
VL - 942
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 1
M1 - L19
ER -