| Title | SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES). II. Structural Properties and Near-infrared Morphologies of Faint Submillimeter Galaxies |
| Authors | Chang, Yu-Yen Ferraro, Nicholas Wang, Wei-Hao Lim, Chen-Fatt Toba, Yoshiki An, Fangxia Chen, Chian-Chou Smail, Ian Shim, Hyunjin Ao, Yiping Bunker, Andy Conselice, Christopher J. Cowley, William da Cunha, Elisabete Fan, Lulu Goto, Tomotsugu Guo, Kexin Ho, Luis C. Hwang, Ho Seong Lee, Chien-Hsiu Lee, Minju Michalowski, Michal J. Oteo, I. Scott, Douglas Serjeant, Stephen Shu, Xinwen Simpson, James Urquhart, Sheona |
| Affiliation | Acad Sinica, Inst Astron & Astrophys, 1 Sect 4 Roosevelt Rd,11F Astromath Bldg, Taipei 10617, Taiwan. Univ Virginia, Dept Astron, 530 McCormick Rd, Charlottesville, VA 22904 USA. Natl Taiwan Univ, Grad Inst Astrophys, 1 Sect 4 Roosevelt Rd, Taipei 10617, Taiwan. Kyoto Univ, Dept Astron, Sakyo Ku, Kitashirakawa Oiwake Cho, Kyoto 6068502, Japan. Univ Durham, Dept Phys, Ctr Extragalact Astron, Durham DH1 3LE, England. Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China. Univ Chinese Acad Sci, Beijing 100049, Peoples R China. European Southern Observ, Karl Schwarzschild Str 2, Garching, Germany. Kyungpook Natl Univ, Dept Earth Sci Educ, 80 Daehak Ro, Daegu 41566, South Korea. NAOJ, Mitaka, Tokyo 1818588, Japan. Univ Oxford, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England. Kavli Inst Phys & Math Universe, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan. Univ Nottingham, Sch Phys & Astron, Univ Pk, Nottingham NG7 2RD, England. Univ Groningen, Kapteyn Astron Inst, POB 800, NL-9700 AV Groningen, Netherlands. Australian Natl Univ, Mt Stromlo Observ, Cotter Rd, Weston, ACT 2611, Australia. Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China. Natl Tsing Hua Univ, Inst Astron, Hsinchu 30013, Taiwan. Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China. Univ Western Australia, Int Ctr Radio Astron Res, M468,35 Stirling Highway, Crawley, WA 6009, Australia. Peking Univ, Sch Phys, Dept Astron, Beijing, Peoples R China. Korea Inst Adv Study, Quantum Universe Ctr, 85 Hoegiro, Seoul 02455, South Korea. NAOJ, Subaru Telescope, Hilo, HI 96720 USA. Univ Tokyo, Dept Astron, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1330033, Japan. Nagoya Univ, Dept Phys, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648602, Japan. Adam Mickiewicz Univ, Fac Phys, Astron Observ Inst, PL-60286 Poznan, Poland. Univ Edinburgh, Royal Observ, Inst Astron, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland. Univ British Columbia, Dept Phys & Astron, 6225 Agr Rd, Vancouver, BC V6T 1Z1, Canada. Open Univ, Sch Phys Sci, Milton Keynes MK7 6AA, Bucks, England. Anhui Normal Univ, Dept Phys, Wuhu 241000, Anhui, Peoples R China. |
| Keywords | galaxies: evolution galaxies: high-redshift galaxies: star formation galaxies: structure submillimeter: galaxies STAR-FORMING GALAXIES COSMOLOGY LEGACY SURVEY HUBBLE-SPACE-TELESCOPE CLERK MAXWELL TELESCOPE HIGH-REDSHIFT MU-M MASSIVE GALAXIES QUIESCENT GALAXIES NUMBER COUNTS MAIN-SEQUENCE |
| Issue Date | 2018 |
| Publisher | ASTROPHYSICAL JOURNAL |
| Citation | ASTROPHYSICAL JOURNAL. 2018, 865(2). |
| Abstract | We present structural parameters and morphological properties of faint 450 mu m selected submillimeter galaxies (SMGs) from the JCMT Large Program, STUDIES, in the COSMOS-CANDELS region. Their properties are compared to an 850 mu m selected and a matched star-forming samples. We investigate stellar structures of 169 faint 450 mu m sources (S-450 = 2.8-29.6 mJy; S/N > 4) at z < 3 using HST near-infrared observations. Based on our spectral energy distribution fitting, half of such faint SMGs (L-IR = 10(11.65 +/- 0.98) L-circle dot) lie above the star formation rate (SFR)/stellar mass plane. The size-mass relation shows that these SMGs are generally similar to less-luminous star-forming galaxies selected by NUV - r versus r - J colors. Because of the intrinsic luminosity of the sample, their rest-frame optical emission is less extended than the 850 mu m sources (S-850 > 2 mJy) and more extended than the star-forming galaxies in the same redshift range. For the stellar mass and SFR-matched sample at z similar or equal to 1 and z similar or equal to 2, the size differences are marginal between faint SMGs and the matched galaxies. Moreover, faint SMGs have similar Sersic indices and projected axis ratios as star-forming galaxies with the same stellar mass and SFR. Both SMGs and the matched galaxies show high fractions (similar to 70%) of disturbed features at z similar or equal to 2, and the fractions depend on the SFRs. These suggest that their star formation activity is related to galaxy merging and the stellar structures of SMGs are similar to those of star-forming galaxies. We show that the depths of submillimeter surveys are approaching the lower luminosity end of star-forming galaxies, allowing us to detect galaxies on the main sequence. |
| URI | http://hdl.handle.net/20.500.11897/528367 |
| ISSN | 0004-637X |
| DOI | 10.3847/1538-4357/aadd18 |
| Indexed | SCI(E) |
| Appears in Collections: | 科维理天文与天体物理研究所 物理学院 |
