SXDF-ALMA 2 arcmin2 deep survey: Resolving and characterizing the infrared extragalactic background light down to 0.5 mJy
Year: 2016
Type: article
Abstract: We present a multiwavelength analysis of five submillimeter sources (S1.1mm = 0.54–2.02 mJy) that were detected during our 1.1 mm deep continuum survey in the Subaru/XMM-Newton Deep Survey Field (SXDF)-UDS-CANDELS field (2 arcmin2, 1σ = 0.055 mJy beam−1) using the Atacama Large Millimeter/submillimeter Array (ALMA). The two brightest sources correspond to a known single-dish (AzTEC) selected bright submillimeter galaxy (SMG), whereas the remaining three are faint SMGs newly uncovered by ALMA. If we exclude the two brightest sources, the contribution of the ALMA-detected faint SMGs to the infrared extragalactic background light is estimated to be $\sim 4.1^{+5.4}_{-3.0}\:$Jy deg−2, which corresponds to $\sim 16^{+22}_{-12}\%$ of the infrared extragalactic background light. This suggests that their contribution to the infrared extragalactic background light is as large as that of bright SMGs. We identified multiwavelength counterparts of the five ALMA sources. One of the sources (SXDF-ALMA3) is extremely faint in the optical to near-infrared region despite its infrared luminosity ($L_\mathrm{IR}\simeq 1\times 10^{12}\,L_{\odot}$ or SFR ≃ 100 M⊙ yr−1). By fitting the spectral energy distributions at the optical-to-near-infrared wavelengths of the remaining four ALMA sources, we obtained the photometric redshifts (zphoto) and stellar masses (M*): zphoto ≃ 1.3–2.5, M* ≃ (3.5–9.5) × 1010 M⊙. We also derived their star formation rates (SFRs) and specific SFRs as ≃30–200 M⊙ yr−1 and ≃0.8–2 Gyr−1, respectively. These values imply that they are main sequence star-forming galaxies.
DOI: 10.1093/pasj/psw073
Authors: Yuki Yamaguchi, Yoichi Tamura, Kotaro Kohno, Itziar Aretxaga, James S. Dunlop, Bunyo Hatsukade, David Hughes, Soh Ikarashi, Shun Ishii, Rob J. Ivison, Takuma Izumi, Ryohei Kawabe, Tadayuki Kodama, Minju Lee, Ryu Makiya, Yuichi Matsuda, Kouichiro Nakanishi, Kouji Ohta, Wiphu Rujopakarn, Ken-ichi Tadaki, Hideki Umehata, Wei-Hao Wang, Grant W. Wilson, Kiyoto Yabe, Min S. Yun
Institutions: The University of Tokyo, Research Center for the Early Universe, National Institute of Astrophysics, Optics and Electronics, Royal Observatory, University of Edinburgh, National Astronomical Observatory of Japan, University of Groningen, European Southern Observatory, The Graduate University for Advanced Studies, SOKENDAI, Kavli Institute for the Physics and Mathematics of the Universe, Max Planck Institute for Astrophysics, Kyoto University, Chulalongkorn University, Max Planck Institute for Extraterrestrial Physics, Institute of Astronomy and Astrophysics, Academia Sinica, Academia Sinica, University of Massachusetts Amherst
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, National Aeronautics and Space Administration, National Radio Astronomy Observatory, National Science Council, Consejo Nacional de Ciencia y Tecnología, Korea Astronomy and Space Science Institute, National Astronomical Observatory of Japan, Japan Society for the Promotion of Science, National Institutes of Natural Sciences
Awards: Investigating Dusty Starburst and Super-Massive Black Hole with 2 mm receiver on LMT, G2033114664, G2419081464, G2713767292, ＡＬＭＡにより見えてきた新しい星形成銀河種族の多波長解析と宇宙星形成史の研究, G339001111, 銀河進化解明に向けたミリ波サブミリ波帯分子分光観測による銀河の熱源診断法の開発, G5896180767, Revealing the environments of long-duration gamma-ray bursts with molecular gas and dust observations, Dust-free Insight into the Obscured Cosmic Accretion History and Modes of Galaxy Assembly, G7381449200, Demonstration of on-chip low-dispersion ultra-wideband spectrograph for submm wavelengths using super-conducting resonators, G8995911382
OpenAlex ID: W2479511781