SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES): Faint-end Counts at 450 μm
文献类型：期刊论文
| 作者 | Wang,Wei-Hao1; Lin,Wei-Ching1,2; Lim,Chen-Fatt1,3; Smail,Ian4; Chapman,Scott C.5; Zheng,Xian Zhong6; Shim,Hyunjin7; Kodama,Tadayuki8; Almaini,Omar9; Ao,Yiping6,8
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| 刊名 | The Astrophysical Journal
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| 出版日期 | 2017-11-14 |
| 卷号 | 850期号:1 |
| 关键词 | galaxies: high-redshift galaxies: evolution submillimeter: galaxies cosmology: cosmic background radiation |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aa911b |
| 英文摘要 | Abstract The SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES) is a three-year JCMT Large Program aiming to reach the 450 μm confusion limit in the COSMOS-CANDELS region to study a representative sample of the high-redshift far-infrared galaxy population that gives rise to the bulk of the far-infrared background. We present the first-year data from STUDIES. We reached a 450 μm noise level of 0.91?mJy for point sources at the map center, covered an area of 151?arcmin2, and detected 98 and 141 sources at 4.0σ and 3.5σ, respectively. Our derived counts are best constrained in the 3.5–25?mJy regime using directly detected sources. Below the detection limits, our fluctuation analysis further constrains the slope of the counts down to 1 mJy. The resulting counts at 1–25 mJy are consistent with a power law having a slope of ?2.59 (±0.10 for 3.5–25 mJy, and ? 0.7 + 0.4 for 1–3.5 mJy). There is no evidence of a faint-end termination or turnover of the counts in this flux density range. Our counts are also consistent with previous SCUBA-2 blank-field and lensing-cluster surveys. The integrated surface brightness from our counts down to 1 mJy is 90.0?±?17.2 Jy deg?2, which can account for up to 83 ? 16 + 15 % of the COBE?450 μm background. We show that Herschel counts at 350 and 500 μm are significantly higher than our 450 μm counts, likely caused by its large beam and source clustering. High angular resolution instruments like SCUBA-2 at 450 μm are therefore highly beneficial for measuring the luminosity and spatial density of high-redshift dusty galaxies. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-850-1-AA911B |
| 出版者 | The American Astronomical Society |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/23591]  |
| 专题 | 中国科学院紫金山天文台 |
| 作者单位 | 1.Academia Sinica Institute of Astronomy and Astrophysics (ASIAA), No. 1, Section 4, Roosevelt Rd., Taipei 10617, Taiwan; whwang@asiaa.sinica.edu.tw 2.Institute of Physics, National Taiwan University, Taipei 10617, Taiwan 3.Institute of Astrophysics, National Taiwan University, Taipei 10617, Taiwan 4.Centre for Extragalactic Astronomy, Department of Physics, Durham University, Durham DH1 3LE, UK 5.Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS B3H 3J5 Canada 6.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China 7.Department of Science Education, Kyungpook National University, Bukgu, Daegu 41566, Korea 8.National Astronomical Observatory of Japan (NAOJ), Mitaka, Tokyo 181-8588, Japan 9.School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, UK 10.Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK |
| 推荐引用方式 GB/T 7714 | Wang,Wei-Hao,Lin,Wei-Ching,Lim,Chen-Fatt,et al. SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES): Faint-end Counts at 450 μm[J]. The Astrophysical Journal,2017,850(1). |
| APA | Wang,Wei-Hao.,Lin,Wei-Ching.,Lim,Chen-Fatt.,Smail,Ian.,Chapman,Scott C..,...&Wardlow,Julie L..(2017).SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES): Faint-end Counts at 450 μm.The Astrophysical Journal,850(1). |
| MLA | Wang,Wei-Hao,et al."SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES): Faint-end Counts at 450 μm".The Astrophysical Journal 850.1(2017). |
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