TY - JOUR
T1 - ALMA Lensing Cluster Survey
T2 - Full Spectral Energy Distribution Analysis of z ∼ 0.5-6 Lensed Galaxies Detected with millimeter Observations
AU - Uematsu, Ryosuke
AU - Ueda, Yoshihiro
AU - Kohno, Kotaro
AU - Toba, Yoshiki
AU - Yamada, Satoshi
AU - Smail, Ian
AU - Umehata, Hideki
AU - Fujimoto, Seiji
AU - Hatsukade, Bunyo
AU - Ao, Yiping
AU - Bauer, Franz Erik
AU - Brammer, Gabriel
AU - Dessauges-Zavadsky, Miroslava
AU - Espada, Daniel
AU - Jolly, Jean Baptiste
AU - Koekemoer, Anton M.
AU - Kokorev, Vasily
AU - Magdis, Georgios E.
AU - Oguri, Masamune
AU - Sun, Fengwu
N1 - Publisher Copyright:
© 2024. The Author(s). Published by the American Astronomical Society.
PY - 2024
Y1 - 2024
N2 - Sub/millimeter galaxies are a key population for the study of galaxy evolution because the majority of star formation at high redshifts occurred in galaxies deeply embedded in dust. To search for this population, we have performed an extensive survey with Atacama Large Millimeter/submillimeter Array (ALMA), called the ALMA Lensing Cluster Survey (ALCS). This survey covers 133 arcmin2 area and securely detects 180 sources at z ∼ 0.5-6 with a flux limit of ∼0.2 mJy at 1.2 mm. Here, we report the results of multiwavelength spectral energy distribution analysis of the whole ALCS sample, utilizing the observed-frame UV to millimeter photometry. We find that the majority of the ALCS sources lie on the star-forming main sequence, with a smaller fraction showing intense starburst activities. The ALCS sample contains high infrared-excess sources ( IRX = log ( L dust / L UV ) > 1 ), including two extremely dust-obscured galaxies (IRX > 5). We also confirm that the ALCS sample probes a broader range in lower dust mass than conventional submillimeter galaxy samples in the same redshift range. We identify six heavily obscured active galactic nucleus (AGN) candidates that are not detected in the archival Chandra data in addition to the three X-ray AGNs reported by Uematsu et al. (2023). The inferred AGN luminosity density shows a possible excess at z = 2-3 compared with that determined from X-ray surveys below 10 keV.
AB - Sub/millimeter galaxies are a key population for the study of galaxy evolution because the majority of star formation at high redshifts occurred in galaxies deeply embedded in dust. To search for this population, we have performed an extensive survey with Atacama Large Millimeter/submillimeter Array (ALMA), called the ALMA Lensing Cluster Survey (ALCS). This survey covers 133 arcmin2 area and securely detects 180 sources at z ∼ 0.5-6 with a flux limit of ∼0.2 mJy at 1.2 mm. Here, we report the results of multiwavelength spectral energy distribution analysis of the whole ALCS sample, utilizing the observed-frame UV to millimeter photometry. We find that the majority of the ALCS sources lie on the star-forming main sequence, with a smaller fraction showing intense starburst activities. The ALCS sample contains high infrared-excess sources ( IRX = log ( L dust / L UV ) > 1 ), including two extremely dust-obscured galaxies (IRX > 5). We also confirm that the ALCS sample probes a broader range in lower dust mass than conventional submillimeter galaxy samples in the same redshift range. We identify six heavily obscured active galactic nucleus (AGN) candidates that are not detected in the archival Chandra data in addition to the three X-ray AGNs reported by Uematsu et al. (2023). The inferred AGN luminosity density shows a possible excess at z = 2-3 compared with that determined from X-ray surveys below 10 keV.
KW - Submillimeter astronomy
KW - Galaxy evolution
KW - High-redshift galaxies
KW - Spectral energy distribution
KW - Active galactic nuclei
U2 - 10.3847/1538-4357/ad26f7
DO - 10.3847/1538-4357/ad26f7
M3 - Journal article
AN - SCOPUS:85190171428
SN - 0004-637X
VL - 965
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 108
ER -