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- Title
ALMA twenty-six arcmin2 survey of GOODS-S at one millimeter (ASAGAO): Source catalog and number counts.
- Authors
Hatsukade, Bunyo; Kohno, Kotaro; Yamaguchi, Yuki; Umehata, Hideki; Ao, Yiping; Aretxaga, Itziar; Caputi, Karina I; Dunlop, James S; Egami, Eiichi; Espada, Daniel; Fujimoto, Seiji; Hayatsu, Natsuki H; Hughes, David H; Ikarashi, Soh; Iono, Daisuke; Ivison, Rob J; Kawabe, Ryohei; Kodama, Tadayuki; Lee, Minju; Matsuda, Yuichi
- Abstract
We present the survey design, data reduction, construction of images, and source catalog of the Atacama Large Millimeter/submillimeter Array (ALMA) twenty-six arcmin2 survey of GOODS-S at one millimeter (ASAGAO). ASAGAO is a deep (1 σ depth ∼ 61 μJy beam−1 for a 250 kλ-tapered map with a synthesized beam size of 0 |${^{\prime\prime}_{.}}$| 51 × 0 |${^{\prime\prime}_{.}}$| 45) and wide area (26 arcmin2) survey on a contiguous field at 1.2 mm. By combining with ALMA archival data in the GOODS-South field, we obtained a deeper map in the same region (1 σ depth ∼ 30 μJy beam−1 for a deep region with a 250 kλ-taper, and a synthesized beam size of 0 |${^{\prime\prime}_{.}}$| 59 × 0 |${^{\prime\prime}_{.}}$| 53), providing the largest sample of sources (25 sources at ≥5.0 σ, 45 sources at ≥4.5 σ) among ALMA blank-field surveys to date. The number counts show that |$52^{+11}_{-8}$| % of the extragalactic background light at 1.2 mm is resolved into discrete sources at S 1.2 mm > 135 μJy. We create infrared (IR) luminosity functions (LFs) in the redshift range of |$z$| = 1–3 from the ASAGAO sources with K s-band counterparts, and constrain the faintest luminosity of the LF at 2.0 < |$z$| < 3.0. The LFs are consistent with previous results based on other ALMA and SCUBA-2 observations, which suggest a positive luminosity evolution and negative density evolution with increasing redshift. We find that obscured star-formation of sources with IR luminosities of log (L IR/ L ⊙) ≳ 11.8 account for ≈60%–90% of the |$z$| ∼ 2 cosmic star-formation rate density.
- Subjects
MILLIMETER waves; GALACTIC redshift; DATA reduction; LUMINOSITY; DATA analysis
- Publication
Publications of the Astronomical Society of Japan, 2018, Vol 70, Issue 6, pN.PAG
- ISSN
0004-6264
- Publication type
Article
- DOI
10.1093/pasj/psy104