A Submillimeter Perspective on the GOODS Fields (SUPER GOODS). I. An Ultradeep SCUBA-2 Survey of the GOODS-N

Cowie, L.L.; Barger, A.J.; Hsu, L.-Y.; Chen, Chian-Chou; Owen, F.N.; Wang, W.-H.

Abstract

In this first paper in the SUPER GOODS series on powerfully star-forming galaxies in the two GOODS fields, we present a deep SCUBA-2 survey of the GOODS-N at both 850 and 450 μm (central rms noise of 0.28 mJy and 2.6 mJy, respectively). In the central region, the 850 μm observations cover the GOODS-N to near the confusion limit of ~1.65 mJy, while over a wider 450 arcmin2 region—well complemented by Herschel far-infrared imaging—they have a median $4\sigma $ limit of 3.5 mJy. We present $\geqslant 4\sigma $ catalogs of 186 850 μm and 31 450 μm selected sources. We use interferometric observations from the Submillimeter Array (SMA) and the Karl G. Jansky Very Large Array (VLA) to obtain precise positions for 114 SCUBA-2 sources (28 from the SMA, all of which are also VLA sources). We present new spectroscopic redshifts and include all existing spectroscopic or photometric redshifts. We also compare redshifts estimated using the 20 cm/850 μm and the 250 cm/850 μm flux ratios. We show that the redshift distribution increases with increasing flux, and we parameterize the dependence. We compute the star formation history and the star formation rate (SFR) density distribution functions in various redshift intervals, finding that they reach a peak at $z=2\mbox{--}3$ before dropping to higher redshifts. We show that the number density per unit volume of $\mathrm{SFR}\,\gtrsim 500\,{M}_{\odot }\,{\mathrm{yr}}^{-1}$ galaxies measured from the SCUBA-2 sample does not change much relative to that of lower SFR galaxies from UV selected samples over $z=2\mbox{--}5$, suggesting that, apart from changes in the normalization, the shape in the number density as a function of SFR is invariant over this redshift interval.

Citation

Cowie, L., Barger, A., Hsu, L., Chen, C., Owen, F., & Wang, W. (2017). A Submillimeter Perspective on the GOODS Fields (SUPER GOODS). I. An Ultradeep SCUBA-2 Survey of the GOODS-N. Astrophysical Journal, 837(2), Article 139. https://doi.org/10.3847/1538-4357/aa60bb

• Journal Article Type: Article
• Acceptance Date: Feb 8, 2017
• Online Publication Date: Mar 13, 2017
• Publication Date: Mar 13, 2017
• Deposit Date: May 3, 2017
• Publicly Available Date: May 3, 2017
• Journal: Astrophysical Journal
• Print ISSN: 0004-637X
• Electronic ISSN: 1538-4357
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 837
• Issue: 2
• Article Number: 139
• DOI: https://doi.org/10.3847/1538-4357/aa60bb
• Public URL: https://durham-repository.worktribe.com/output/1359576