The SCUBA-2 cluster snapshot survey - I. Catalogue of lensed galaxies and submillimetre-bright central galaxies

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

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The SCUBA-2 Cluster Snapshot Survey (S2CSS) observed 202 rich clusters of galaxies at 850 μm in relatively poor submillimetre observing conditions (τ225 GHz > 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.

Original languageEnglish (US)
Pages (from-to)2757-2778
Number of pages22
JournalMonthly Notices of the Royal Astronomical Society
Volume484
Issue number2
DOIs
StatePublished - Apr 1 2019
Externally publishedYes

Keywords

  • Cosmology: observations
  • Galaxies: active
  • Galaxies: clusters: general
  • Galaxies: evolution
  • Galaxies: high-redshift
  • Submillimetre: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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