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

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dc.creator Wang, Wei-Hao
dc.creator Lin, Wei-Ching
dc.creator Lim, Chen-Fatt
dc.creator Smail, Ian
dc.creator Chapman, Scott C.
dc.creator Zheng, Xian Zhong
dc.creator Shim, Hyunjin
dc.creator Kodama, Tadayuki
dc.creator Almaini, Omar
dc.creator Ao, Yiping
dc.creator Blain, Andrew W.
dc.creator Bourne, Nathan
dc.creator Bunker, Andrew J.
dc.creator Chang, Yu-Yen
dc.creator Chao, Dani C.Y.
dc.creator Chen, Chian-Chou
dc.creator Clements, David L.
dc.creator Conselice, Christopher J.
dc.creator Cowley, William I.
dc.creator Dannerbauer, Helmut
dc.creator Dunlop, James S.
dc.creator Geach, James E.
dc.creator Goto, Tomotsugu
dc.creator Jiang, Linhua
dc.creator Ivison, Rob J.
dc.creator Jeong, Woong-Seob
dc.creator Kohno, Kotaro
dc.creator Kong, Xu
dc.creator Lee, Chien-Hsu
dc.creator Lee, Hyung Mok
dc.creator Lee, Minju
dc.creator Michałowski, Michał J.
dc.creator Oteo, Iván
dc.creator Sawicki, Marcin, 1969-
dc.creator Scott, Douglas
dc.creator Shu, Xin Wen
dc.creator Simpson, James M.
dc.creator Tee, Wei-Leong
dc.creator Toba, Yoshiki
dc.creator Valiante, Elisabetta
dc.creator Wang, Jun-Xian
dc.creator Wang, Ran
dc.creator Wardlow, Julie L. 2021-09-24T15:10:24Z 2021-09-24T15:10:24Z 2017-11-14
dc.identifier.issn 0004-637X
dc.identifier.issn 1538-4357
dc.description Published Version en_CA
dc.description.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. en_CA
dc.description.provenance Submitted by Sherry Briere ( on 2021-09-24T15:10:24Z No. of bitstreams: 1 Sawicki_Marcin _article_2017.pdf: 1696261 bytes, checksum: c3a614434dafc4d956e1ec4f92399842 (MD5) en
dc.description.provenance Made available in DSpace on 2021-09-24T15:10:24Z (GMT). No. of bitstreams: 1 Sawicki_Marcin _article_2017.pdf: 1696261 bytes, checksum: c3a614434dafc4d956e1ec4f92399842 (MD5) Previous issue date: 2017-11-14 en
dc.language.iso en en_CA
dc.publisher The American Astronomical Society en_CA
dc.rights <a rel="license" href=""><img alt="Creative Commons License" style="border-width:0" src="" /></a> This work is licensed under a <a rel="license" href="">Creative Commons Attribution 4.0 International License</a>
dc.title SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES): Faint-end Counts at 450 μm en_CA
dc.type Text en_CA
dcterms.bibliographicCitation The Astrophysical Journal 850(1), 37. (2017) en_CA
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