Properties of the SCUBA-2 850 µm Sources in the Akari NEP-Deep Field
Goto, Tomotsugu; Kim, Seong Jin; Pearson, Chris; Barrufet, Laia; Campos Varillas, Maria del Carmen; Jeong, Woong-Seob; Matsuhara, Hideo; Kim, Minjin; Oi, Nagisa; Malkan, Matt; Takagi, Toshinobu; Kim, Helen K.; Miyaji, Takamitsu; Ko, Jongwan; Seo, Hyunjong; Pyo, Jeonghyun; Kim, Min Gyu; Diaz Tello, Jorge
South Korea, Japan, United Kingdom, United States, Mexico, Taiwan
Abstract
We carry out the study of SMGs in the AKARI NEP-Deep field using James Clerk Maxwell Telescope (JCMT) SCUBA-2 850 μm source catalog released as a part of SCUBA-2 Cosmology Legacy Survey (S2CLS) program. The SCUBA-2 850 μm map has a root mean square (rms) noise of 1.2 mJy beam^{-1} and covers an area of 0.60 degree^{2}. We find 4 sub-millimeter galaxies (SMGs) which have counterparts to Herschel sources with spectroscopic redshifts in the literature. In addition, 3 dust obscured galaxies (DOGs) detected in Herschel bands are also selected as a comparison sample. We derive IR luminosities of SMGs using CIGALE code, which are similar to those of high redshift SMGs from previous studies. The contribution of AGN to the total IR luminosity in SMG (2%-11%) is smaller than lower limit of that in DOG (19%-35%), which is consistent with the expectation from the evolutionary scenario of massive galaxies. We search for SMGs in the overdense region as candidates of protocluster and investigate 4 candidates among them including candidates around three DOGs. Finally, we argue that follow-up spectroscopic observation for the NEP-Deep field will provide crucial information to understand the role of SMGs in the evolution of massive galaxies.