SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES): Faint-end Counts at 450 mu m

doi:10.3847/1538-4357/aa911b

	SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES): Faint-end Counts at 450 mu m
	Wang, Wei-Hao 1; Lin, Wei-Ching 1,2; Lim, Chen-Fatt 1,3; Smail, Ian 4; Chapman, Scott C.5; Zheng, Xian Zhong 6; Shim, Hyunjin 7; Kodama, Tadayuki 8; Almaini, Omar 9; Ao, Yiping6
刊名	ASTROPHYSICAL JOURNAL
	2017-11-20
卷号	850 期号:1 页码:17
关键词	galaxies: high-redshift galaxies: evolution submillimeter: galaxies cosmology: cosmic background radiation
ISSN号	0004-637X
DOI	10.3847/1538-4357/aa911b
通讯作者	Wang, Wei-Hao(whwang@asiaa.sinica.edu.tw)
英文摘要	The SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES) is a three-year JCMT Large Program aiming to reach the 450 mu m 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 mu m noise level of 0.91 mJy for point sources at the map center, covered an area of 151 arcmin(2), and detected 98 and 141 sources at 4.0 sigma and 3.5 sigma, 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 (+0.4)(-0.7) 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 mu m background. We show that Herschel counts at 350 and 500 mu m are significantly higher than our 450 mu m counts, likely caused by its large beam and source clustering. High angular resolution instruments like SCUBA-2 at 450 mu m are therefore highly beneficial for measuring the luminosity and spatial density of high-redshift dusty galaxies.
WOS关键词	COSMOLOGY LEGACY SURVEY ; STAR-FORMING GALAXIES ; REDSHIFT SUBMILLIMETER GALAXIES ; P(D) FLUCTUATION ANALYSIS ; NUMBER COUNTS ; FIELD-SOUTH ; LUMINOSITY FUNCTION ; FORMATION HISTORY ; LENSING CLUSTERS ; DUSTY GALAXIES
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000415297500017
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/22583]
专题	中国科学院紫金山天文台
通讯作者	Wang, Wei-Hao
作者单位	1.Acad Sinica Inst Astron & Astrophys, 1 Sect 4,Roosevelt Rd, Taipei, Taiwan 2.Natl Taiwan Univ, Inst Phys, Taipei 10617, Taiwan 3.Natl Taiwan Univ, Inst Astrophys, Taipei 10617, Taiwan 4.Univ Durham, Dept Phys, Ctr Extragalact Astron, Durham DH1 3LE, England 5.Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada 6.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 7.Kyungpook Natl Univ, Dept Sci Educ, Daegu 41566, South Korea 8.Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan 9.Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England 10.Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England
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 mu m[J]. ASTROPHYSICAL JOURNAL,2017,850(1):17.
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 mu m.ASTROPHYSICAL JOURNAL,850(1),17.
MLA	Wang, Wei-Hao,et al."SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES): Faint-end Counts at 450 mu m".ASTROPHYSICAL JOURNAL 850.1(2017):17.