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- Title
SXDF-ALMA 2-arcmin<sup>2</sup> deep survey: 1.1-mm number counts.
- Authors
Bunyo HATSUKADE; Kotaro KOHNO; Hideki UMEHATA; Itziar ARETXAGA; CAPUTI, Karina I.; DUNLOP, James S.; IKARASHI, Soh; Daisuke IONO; IVISON, Rob J.; Minju LEE; Ryu MAKIYA; Yuichi MATSUDA; Kentaro MOTOHARA; Kouichiro NAKANISHI; Kouji OHTA; Ken-ich TADAKIG; Yoichi TAMURA; Wei-Hao WANG; WILSON, Grant W.; Yuki YAMAGUCHI
- Abstract
We report 1.1-mm number counts revealed with the Atacama Large Millimeter/ submillimeter Array (ALMA) in the Subaru/XMM-Newton Deep Survey Field (SXDF). The advent of ALMA enables us to reveal millimeter-wavelength number counts down to the faint end without source confusion. However, previous studies are based on the ensemble of serendipitously detected sources in fields originally targeting different sources and could be biased due to the clustering of sources around the targets. We derive number counts in the flux range of 0.2-2 mJy by using 23 (≥4σ) sources detected in a continuous 2.0-arcmin2 area of the SXDF. The number counts are consistent with previous results within errors, suggesting that the counts derived from serendipitously detected sources are not significantly biased, although there could be field-to-field variation due to the small survey area. By using the best-fitting function of the number counts, we find that ~40% of the extragalactic background light at 1.1mm is resolved at S1.1 mm > 0.2 mJy.
- Subjects
METAPHYSICAL cosmology; GALACTIC evolution; GALAXY formation; GALACTIC magnitudes; COSMOLOGICAL distances
- Publication
Publications of the Astronomical Society of Japan, 2016, Vol 68, Issue 3, p1
- ISSN
0004-6264
- Publication type
Article
- DOI
10.1093/pasj/psw026