Multiband Optical and Near-Infrared Properties of Faint Submillimeter Galaxies with Serendipitous ALMA Detections

Creators: Patil, Pallavi; Nyland, Kristina; Lacy, Mark; Farrah, Duncan; Afonso, José; Barkhouse, Wayne; Surace, Jason

Abstract

We present a catalog of 26 faint submillimeter galaxies (SMGs) in the XMM Large Scale Structure (XMM-LSS) field identified by cross-matching serendipitously detected sources in archival pre–Atacama Large Millimeter Array (ALMA) band 6 and 7 data with multiband near-infrared (NIR) and optical data from the Spitzer Extragalactic Representative Volume Survey, the VISTA Deep Extragalactic Survey, the Canada–France–Hawaii Telescope Legacy Large Survey, and the Hyper Suprime-Cam Subaru Strategic Program. Of the 26 SMGs in our sample, 15 are identified here for the first time. The majority of the sources in our sample (16/26) have faint submillimeter fluxes (0.1 mJy < S_(1mm) < 1 mJy). In addition to the 26 SMGs with multiband optical and NIR detections, there are 60 highly reliable (>5σ) ALMA sources with no counterpart in any other band down to an Infrared Array Camera (IRAC) [4.5] AB magnitude of ≈23.7. To further characterize the 26 galaxies with both ALMA and optical/NIR counterparts, we provide 13-band forced photometry for the entire catalog using the Tractor and calculate photometric redshifts and rest-frame colors. The median redshift of our sample is 〈z〉 = 2.66. We find that our sample galaxies have bluer colors compared to bright SMGs, and the UVJ color plot indicates that their colors are consistent with main-sequence star-forming galaxies. Our results provide new insights into the nature of the faint population of SMGs and also highlight opportunities for galaxy evolution studies based on archival ALMA data.

Additional Information

© 2019 The American Astronomical Society. Received 2018 June 6; revised 2018 November 18; accepted 2018 December 9; published 2019 January 25. The National Radio Astronomy Observatory is a facility of the National Science Foundation (NSF) operated under cooperative agreement by Associated Universities, Inc. Support for this work was provided by the NSF through the Grote Reber Fellowship Program administered by Associated Universities, Inc./National Radio Astronomy Observatory. This paper makes use of the following ALMA data: ADS/JAO.ALMA #2011.0.00115.S, #2011.0.00648.S, #2011.0.00539.S, #2012.1.00326.S, #2012.1.00374.S, #2012.1.00934.S, #2013.1.00815.S, #2013.A.00021.S, #2015.1.01105.S. ALMA is a partnership of ESO (representing its member states), NSF (USA), and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan) and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO, and NAOJ. This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. K.N. acknowledges support provided by the grant associated with Spitzer proposal 11086. J.A. gratefully acknowledges support from the Science and Technology Foundation (FCT, Portugal) through the research grants No. PTDC/FIS-AST/2194/2012, No. PTDC/FIS-AST/29245/2017, No. UID/FIS/04434/2013, and No. UID/FIS/04434/2019. The authors have made use of Astropy, a community-developed core Python package for Astronomy Astropy Collaboration et al. (2013). We also used MONTAGE, which is funded by the National Science Foundation under grant No. ACI-1440620, and was previously funded by the National Aeronautics and Space Administration's Earth Science Technology Office, Computation Technologies Project, under Cooperative Agreement No. NCC5-626 between NASA and the California Institute of Technology. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Facilities: ALMA - Atacama Large Millimeter Array, Spitzer - , CFHT - , VISTA - , Subaru - .

Attached Files

Published - Patil_2019_ApJ_871_109.pdf

Accepted Version - 1812.04108.pdf

Files

1812.04108.pdf

Files (10.0 MB)

Name	Size	Download all
1812.04108.pdf md5:2b097c31a941709447407f48e4a21b19	6.1 MB	Preview Download
Patil_2019_ApJ_871_109.pdf md5:39484b118551c4e8c2a1fda98ea0ece7	3.9 MB	Preview Download

Additional details

	All versions	This version
Views	0	0
Downloads	0	0
Data volume	0 Bytes	0 Bytes