Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

The Herschel Bright Sources (HerBS): sample definition and SCUBA-2 observations

Bakx, Tom, Eales, Stephen ORCID:, Negrello, Mattia ORCID:, Smith, Matthew ORCID:, Valiante, Elisabetta, Holland, W. S., Baes, M., Bourne, N., Clements, D. L., Dannerbauer, H., De Zotti, G., Dunne, Loretta ORCID:, Dye, S., Furlanetto, C., Ivison, R. J., Maddox, Steve ORCID:, Marchetti, L., Michałowski, M. J., Omont, A., Oteo, I., Wardlow, J. L., Werf, P. van der and Yang, C. 2018. The Herschel Bright Sources (HerBS): sample definition and SCUBA-2 observations. Monthly Notices of the Royal Astronomical Society 473 (2) , pp. 1751-1773. 10.1093/mnras/stx2267

[thumbnail of The Herschel Bright Sources (HerBS).pdf]
PDF - Accepted Post-Print Version
Download (7MB) | Preview


We present the Herschel Bright Sources (HerBS) sample, a sample of bright, high-redshift Herschel sources detected in the 616.4 square degree H-ATLAS survey. The HerBS sample contains 209 galaxies, selected with a 500 µm flux density greater than 80 mJy and an estimated redshift greater than 2. The sample consists of a combination of HyLIRGs and lensed ULIRGs during the epoch of peak cosmic star formation. In this paper, we present SCUBA-2 observations at 850 µm of 189 galaxies of the HerBS sample, 152 of these sources were detected. We fit a spectral template to the Herschel-SPIRE and 850 µm SCUBA-2 flux densities of 22 sources with spectroscopically determined redshifts, using a two-component modified blackbody spectrum as a template. We find a cold- and hot-dust temperature of 21.29+1.35 −1.66 K and 45.80+2.88 −3.48 K, a cold-to-hot dust mass ratio of 26.62+5.61 −6.74 and a β of 1.83+0.14 −0.28. The poor quality of the fit suggests that the sample of galaxies is too diverse to be explained by our simple model. Comparison of our sample to a galaxy evolution model indicates that the fraction of lenses is high. Out of the 152 SCUBA-2 detected galaxies, the model predicts 128.4 ± 2.1 of those galaxies to be lensed (84.5%). The SPIRE 500 µm flux suggests that out of all 209 HerBS sources, we expect 158.1 ± 1.7 lensed sources, giving a total lensing fraction of 76 per cent.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Additional Information: Erratum recorded at
Publisher: Oxford University Press
ISSN: 0035-8711
Date of First Compliant Deposit: 15 September 2017
Date of Acceptance: 4 September 2017
Last Modified: 19 Nov 2023 17:50

Citation Data

Cited 9 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item


Downloads per month over past year

View more statistics