An AzTEC 1.1-mm survey for ULIRGs in the field of the Galaxy Cluster MS 0451.6-0305

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

Research output: Contribution to journalArticle

16 Citations (Scopus)

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.

Original languageEnglish (US)
Pages (from-to)2299-2317
Number of pages19
JournalMonthly Notices of the Royal Astronomical Society
Volume401
Issue number4
DOIs
StatePublished - Feb 2010
Externally publishedYes

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galaxies
radio
star formation rate
signal-to-noise ratio
dust
cameras
energy
rate
radio emission
spectral energy distribution
catalogs
star formation
signal to noise ratios
telescopes
color
test
detection
distribution

Keywords

  • Galaxies: clusters: individual: MS 0451-03
  • Submillimetre

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Wardlow, J. L., Smail, I., Wilson, G. W., Yun, M. S., Coppin, K. E. K., Cybulski, R., ... Scott, K. S. (2010). An AzTEC 1.1-mm survey for ULIRGs in the field of the Galaxy Cluster MS 0451.6-0305. Monthly Notices of the Royal Astronomical Society, 401(4), 2299-2317. https://doi.org/10.1111/j.1365-2966.2009.15847.x

An AzTEC 1.1-mm survey for ULIRGs in the field of the Galaxy Cluster MS 0451.6-0305. / Wardlow, J. L.; Smail, Ian; 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, Philip; Perera, T. A.; Scott, K. S.

In: Monthly Notices of the Royal Astronomical Society, Vol. 401, No. 4, 02.2010, p. 2299-2317.

Research output: Contribution to journalArticle

Wardlow, JL, Smail, I, Wilson, GW, Yun, MS, Coppin, KEK, Cybulski, R, Geach, JE, Ivison, RJ, Aretxaga, I, Austermann, JE, Edge, AC, Fazio, GG, Huang, J, Hughes, DH, Kodama, T, Kang, Y, Kim, S, Mauskopf, P, Perera, TA & Scott, KS 2010, 'An AzTEC 1.1-mm survey for ULIRGs in the field of the Galaxy Cluster MS 0451.6-0305', Monthly Notices of the Royal Astronomical Society, vol. 401, no. 4, pp. 2299-2317. https://doi.org/10.1111/j.1365-2966.2009.15847.x
Wardlow, J. L. ; Smail, Ian ; 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, Philip ; Perera, T. A. ; Scott, K. S. / An AzTEC 1.1-mm survey for ULIRGs in the field of the Galaxy Cluster MS 0451.6-0305. In: Monthly Notices of the Royal Astronomical Society. 2010 ; Vol. 401, No. 4. pp. 2299-2317.
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T1 - An AzTEC 1.1-mm survey for ULIRGs in the field of the Galaxy Cluster MS 0451.6-0305

AU - Wardlow, J. L.

AU - Smail, Ian

AU - Wilson, G. W.

AU - Yun, M. S.

AU - Coppin, K. E K

AU - Cybulski, R.

AU - Geach, J. E.

AU - Ivison, R. J.

AU - Aretxaga, I.

AU - Austermann, J. E.

AU - Edge, A. C.

AU - Fazio, G. G.

AU - Huang, J.

AU - Hughes, D. H.

AU - Kodama, T.

AU - Kang, Y.

AU - Kim, S.

AU - Mauskopf, Philip

AU - Perera, T. A.

AU - Scott, K. S.

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N2 - 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.

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