Abstract

SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES): What Have We Learned So Far

Wei-Hao Wang (ASIAA), Chen-Fatt Lim (ASIAA), Chian-Chou Chen (ASIAA), Ian Smail (Durham), Ugne Dudzeviciute (Durham), Zhen-Kai Gao (NCU, ASIAA), Yu-Hsuan Hwang (NTU, ASIAA)

STUDIES is a JCMT Large Program focusing on obtaining confusion limited 450 um images to reach the deepest far-IR selection of high-z dusty galaxies. We have completed our imaging in the COSMOS field, and reached unprecedented depth (rms~0.53 mJy in the map center) and sample size (>400 detections at >3.5 sigma) at 450 um. We used the data to constructed deep 450 um counts and far-IR luminosity functions of galaxies at z up to ~ 3. We compared the evolution of dust properties in 450 and 850 um selected galaxies. We used the deep JCMT and ALMA data to constrain the dusty galaxy contaminations in rest-frame UV/optical color-selected quiescent galaxies. We also used the 450 um sample in the center of COSMOS to construct a machine-learning algorithm to select huge samples of dusty galaxy candidates over the entire COSMOS field using the COSMOS optical/near-IR catalog. I will summarize our works using STUDIES, and hope some of our findings or methodologies can help to formulate future studies using NEP data.