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The SCUBA-2 Cluster Snapshot Survey - I: Catalogue of Lensed Galaxies and Submillimetre-Bright Central Galaxies

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posted on 2019-09-23, 16:20 authored by Ryan A. Cheale, James E. Geach, Alastair C. Edge, Andrew W. Blain, Scott C. Chapman, Eiichi Egami, Mike T. Hogan, Timothy D. Rawle, Tracy M. A. Webb
The SCUBA-2 Cluster Snapshot Survey (S2CSS) observed 202 rich clusters of galaxies at 850 μm in relatively poor submillimetre observing conditions (⁠τ225GHz>0.1⁠) with the aim of identifying rare examples of bright (tens of mJy) gravitationally lensed submillimetre galaxies. The S2CSS covered over 0.33 deg2 to an average depth of σ850≈12 mJy beam−1. Here we present a sample of 97 bright 850-μm point sources selected from the S2CSS that are potentially gravitationally lensed, and eight sources for which the strong submillimetre emission is co-located with the central brightest cluster galaxy (BCG). We construct far-infrared spectral energy distributions for those sources with Herschel SPIRE coverage and use these distributions to estimate the redshifts and luminosities of the sources. The bright submillimetre flux density of our sources makes them excellent targets for detailed follow-up work that will allow the detection of spectral features in the submillimetre/millimetre that would otherwise be too faint to detect. Through a stacking analysis, we also investigate the average submillimetre/radio properties of BCGs, determining the average 850-μm flux of BCGs as a function of radio luminosity.

Funding

RAC is supported by the Royal Society, and JEG is supported by a Royal Society University Research Fellowship. ACE acknowledges support from STFC grant ST/P00541/1. This research made use of the following software packages: SciPy (Jones et al. 2001), ASTROPY (Astropy Collaboration et al. 2013), MATPLOTLIB (Hunter 2007) and the KAPTEYN package (Terlouw & Vogelaar 2015). IRS acknowledges support from an ERC Advanced Grant DUSTYGAL(321334), STFC (ST/P000J41/1) and a Royal Society/Wolfson Merit Award. The James Clerk Maxwell Telescope is operated by the East Asian Observatory on behalf of The National Astronomical Observatory of Japan, Academia Sinica Institute of Astronomy and Astrophysics, the Korea Astronomy and Space Science Institute, the National Astronomical Observatories of China and the Chinese Academy of Sciences (grant no. XDB09000000), with additional funding support from the Science and Technology Facilities Council of the United Kingdom and participating universities in the United Kingdom and Canada.

History

Citation

Monthly Notices of the Royal Astronomical Society, 2019, 484(2), pp. 2757–2778

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

  • VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society

Publisher

Oxford University Press (OUP), Royal Astronomical Society

issn

0035-8711

Acceptance date

2018-12-12

Copyright date

2019

Available date

2019-09-23

Publisher version

https://academic.oup.com/mnras/article/484/2/2757/5305294

Language

en

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