An AzTEC 1.1-mm survey for ULIRGs in the field of the Galaxy Cluster MS0451.6-0305

Wardlow, J.L.; Smail, I.; Wilson, G.W.; Yun, M.S.; Coppin, K.E.K.; Cybulski, R.; Geach, J.E.; Ivison, R.J.; Aretxaga, I.; Austermann, J.E.; Edge, A.C.; Fazio, G.G.; Huang, J.; Hughes, D.H.; Kodama, T.; Kang, Y.; Kim, S.; Mauskopf, P.D.; Perera, T.A.; Scott, K.S.

doi:10.1111/j.1365-2966.2009.15847.x

An AzTEC 1.1-mm survey for ULIRGs in the field of the Galaxy Cluster MS0451.6-0305

Wardlow, J.L.; Smail, I.; Wilson, G.W.; Yun, M.S.; Coppin, K.E.K.; Cybulski, R.; Geach, J.E.; Ivison, R.J.; Aretxaga, I.; Austermann, J.E.; Edge, A.C.; Fazio, G.G.; Huang, J.; Hughes, D.H.; Kodama, T.; Kang, Y.; Kim, S.; Mauskopf, P.D.; Perera, T.A.; Scott, K.S.

Authors

J.L. Wardlow

Professor Ian Smail ian.smail@durham.ac.uk
Emeritus Professor

G.W. Wilson

M.S. Yun

K.E.K. Coppin

R. Cybulski

J.E. Geach

R.J. Ivison

I. Aretxaga

J.E. Austermann

Professor Alastair Edge alastair.edge@durham.ac.uk
Professor

G.G. Fazio

J. Huang

D.H. Hughes

T. Kodama

Y. Kang

S. Kim

P.D. Mauskopf

T.A. Perera

K.S. Scott

Abstract

We have undertaken a deep (σ∼ 1.1 mJy) 1.1-mm survey of the z= 0.54 cluster MS 0451.6−0305 using the AzTEC camera on the James Clerk Maxwell Telescope. We detect 36 sources with signal-to-noise ratio (S/N) ≥ 3.5 in the central 0.10 deg2 and present the AzTEC map, catalogue and number counts. We identify counterparts to 18 sources (50 per cent) using radio, mid-infrared, Spitzer InfraRed Array Camera (IRAC) and Submillimetre Array data. Optical, near- and mid-infrared spectral energy distributions are compiled for the 14 of these galaxies with detectable counterparts, which are expected to contain all likely cluster members. We then use photometric redshifts and colour selection to separate background galaxies from potential cluster members and test the reliability of this technique using archival observations of submillimetre galaxies. We find two potential MS 0451−03 members, which, if they are both cluster galaxies, have a total star formation rate (SFR) of ∼100 M⊙ yr−1– a significant fraction of the combined SFR of all the other galaxies in MS 0451−03. We also examine the stacked rest-frame mid-infrared, millimetre and radio emission of cluster members below our AzTEC detection limit, and find that the SFRs of mid-IR-selected galaxies in the cluster and redshift-matched field populations are comparable. In contrast, the average SFR of the morphologically classified late-type cluster population is nearly three times less than the corresponding redshift-matched field galaxies. This suggests that these galaxies may be in the process of being transformed on the red sequence by the cluster environment. Our survey demonstrates that although the environment of MS 0451−03 appears to suppress star formation in late-type galaxies, it can support active, dust-obscured mid-IR galaxies and potentially millimetre-detected LIRGs.

Citation

Wardlow, J., Smail, I., Wilson, G., Yun, M., Coppin, K., Cybulski, R., …Scott, K. (2010). An AzTEC 1.1-mm survey for ULIRGs in the field of the Galaxy Cluster MS0451.6-0305. Monthly Notices of the Royal Astronomical Society, 401(4), 2299-2317. https://doi.org/10.1111/j.1365-2966.2009.15847.x

Journal Article Type	Article
Publication Date	Feb 1, 2010
Deposit Date	Jan 30, 2012
Publicly Available Date	Aug 8, 2014
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	401
Issue	4
Pages	2299-2317
DOI	https://doi.org/10.1111/j.1365-2966.2009.15847.x
Keywords	Galaxies, Clusters, MS 0451−03, Submillimetre.

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This article has been accepted for publication in Monthly notices of the Royal Astronomical Society © 2013 The Authors Published by Oxford University Press on behalf of Royal Astronomical Society. All rights reserved.