The SCUBA-2 Cosmology Legacy Survey: demographics of the 450 \mu m-population
Date
2013-08-20Author
Roseboom, I. G.
Dunlop, J. S.
Cirasuolo, M.
Geach, J. E.
Smail, I.
Halpern, M.
van der Werf, P.
Almaini, O.
Arumugam, V.
Asboth, V.
Auld, R.
Blain, A.
Bremer, M. N.
Bock, J.
Bowler, R.
Buitrago, F.
Chapin, E.
Chapman, S.
Chrysostomou, A.
Clarke, C.
Conley, A.
Coppin, K. E. K.
Danielson, A. L. R.
Farrah, D.
Glenn, J.
Hatziminaoglou, E.
Ibar, E.
Ivison, R. J.
Jenness, T.
van Kampen, E.
Karim, A.
Mackenzie, T.
Marsden, G.
Meijerink, R.
Michałowski, M. J.
Oliver, S. J.
Page, M. J.
Pearson, E.
Scott, Douglas
Simpson, J. M.
Smith, D. J. B.
Spaans, M.
Swinbank, A. M.
Symeonidis, M.
Targett, T.
Valiante, E.
Viero, M.
Wang, L.
Willott, C. J.
Zemcov, M.
Metadata
Show full item recordAbstract
We investigate the multi-wavelength properties of a sample of 450-\mu m selected sources from the SCUBA-2 Cosmology Legacy Survey (S2CLS). A total of 69 sources were identified above 4\sigma\ in deep SCUBA-2 450-\mu m observations overlapping the UDS and COSMOS fields and covering 210 sq. arcmin to a typical depth of \sigma 450=1.5 mJy. Reliable cross identification are found for 58 sources (84 per cent) in Spitzer and Hubble Space Telescope WFC3/IR data. The photometric redshift distribution (dN/dz) of 450\mu m-selected sources is presented, showing a broad peak in the redshift range 1=10^12 +/- 0.8 L_sol, =42 +/- 11 K and =1.6 +/- 0.5, respectively. The relationship between these SED parameters and the physical properties of galaxies is investigated, revealing correlations between T_D and LIR and between \beta_D and both stellar mass and effective radius. The connection between star formation rate and stellar mass is explored, with 24 per cent of 450 \mu m sources found to be ``star-bursts'', i.e. displaying anomalously high specific SFRs. However, both the number density and observed properties of these ``star-burst'' galaxies are found consistent with the population of normal star-forming galaxies.
Citation
Roseboom, I. G., J. S. Dunlop, M. Cirasuolo, J. E. Geach, et al. 2013. "The SCUBA-2 Cosmology Legacy Survey: demographics of the 450 \mu m-population." Monthly Notices of the Royal Astronomical Society 436:430.