HerMES: a search for high-redshift dusty galaxies in the HerMES Large Mode Survey – catalogue, number counts and early results

Asboth, V.; Conley, A.; Sayers, J.; Béthermin, M.; Chapman, S.C.; Clements, D.L.; Cooray, A.; Dannerbauer, H.; Farrah, D.; Glenn, J.; Golwala, S.R.; Halpern, M.; Ibar, E.; Ivison, R.J.; Maloney, P.R.; Marques-Chaves, R.; Martinez-Navajas, P.I.; Oliver, S.J.; Pérez-Fournon, I.; Riechers, D.A.; Rowan-Robinson, M.; Scott, Douglas; Siegel, S.R.; Vieira, J.D.; Viero, M.; Wang, L.; Wardlow, J.; Wheeler, J.

doi:10.1093/mnras/stw1769

HerMES: a search for high-redshift dusty galaxies in the HerMES Large Mode Survey – catalogue, number counts and early results

Asboth, V.; Conley, A.; Sayers, J.; Béthermin, M.; Chapman, S.C.; Clements, D.L.; Cooray, A.; Dannerbauer, H.; Farrah, D.; Glenn, J.; Golwala, S.R.; Halpern, M.; Ibar, E.; Ivison, R.J.; Maloney, P.R.; Marques-Chaves, R.; Martinez-Navajas, P.I.; Oliver, S.J.; Pérez-Fournon, I.; Riechers, D.A.; Rowan-Robinson, M.; Scott, Douglas; Siegel, S.R.; Vieira, J.D.; Viero, M.; Wang, L.; Wardlow, J.; Wheeler, J.

Authors

V. Asboth

A. Conley

J. Sayers

M. Béthermin

S.C. Chapman

D.L. Clements

A. Cooray

H. Dannerbauer

D. Farrah

J. Glenn

S.R. Golwala

M. Halpern

E. Ibar

R.J. Ivison

P.R. Maloney

R. Marques-Chaves

P.I. Martinez-Navajas

S.J. Oliver

I. Pérez-Fournon

D.A. Riechers

M. Rowan-Robinson

Douglas Scott

S.R. Siegel

J.D. Vieira

M. Viero

L. Wang

J. Wardlow

J. Wheeler

Abstract

Selecting sources with rising flux densities towards longer wavelengths from Herschel/Spectral and Photometric Imaging Receiver (SPIRE) maps is an efficient way to produce a catalogue rich in high-redshift (z > 4) dusty star-forming galaxies. The effectiveness of this approach has already been confirmed by spectroscopic follow-up observations, but the previously available catalogues made this way are limited by small survey areas. Here we apply a map-based search method to 274 deg2 of the Herschel Multi-tiered Extragalactic Survey (HerMES) Large Mode Survey and create a catalogue of 477 objects with SPIRE flux densities S500 > S350 > S250 and a 5σ cut-off S500 > 52 mJy. From this catalogue we determine that the total number of these ‘red’ sources is at least an order of magnitude higher than predicted by galaxy evolution models. These results are in agreement with previous findings in smaller HerMES fields; however, due to our significantly larger sample size we are also able to investigate the shape of the red source counts for the first time. We have obtained spectroscopic redshift measurements for two of our sources using the Atacama Large Millimeter/submillimeter Array. The redshifts z = 5.1 and 3.8 confirm that with our selection method we can indeed find high-redshift dusty star-forming galaxies.

Citation

Asboth, V., Conley, A., Sayers, J., Béthermin, M., Chapman, S., Clements, D., …Wheeler, J. (2016). HerMES: a search for high-redshift dusty galaxies in the HerMES Large Mode Survey – catalogue, number counts and early results. Monthly Notices of the Royal Astronomical Society, 462(2), 1989-2000. https://doi.org/10.1093/mnras/stw1769

Journal Article Type	Article
Acceptance Date	Jul 19, 2016
Online Publication Date	Jul 25, 2016
Publication Date	Oct 21, 2016
Deposit Date	May 3, 2017
Publicly Available Date	May 3, 2017
Journal	Monthly Notices of the Royal Astronomical Society
Print ISSN	0035-8711
Electronic ISSN	1365-2966
Publisher	Royal Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	462
Issue	2
Pages	1989-2000
DOI	https://doi.org/10.1093/mnras/stw1769

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This article has been published in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.