The Herschel Multi-Tiered Extragalactic Survey: SPIRE-mm Photometric Redshifts
Date
2011-09-13Author
Roseboom, I. G.
Ivison, R. J.
Greve, T. R.
Amblard, A.
Arumugam, V.
Auld, R.
Aussel, H.
Bethermin, M.
Blain, A.
Bock, J.
Boselli, A.
Brisbin, D.
Buat, V.
Burgarella, D.
Castro-Rodriguez, N.
Cava, A.
Chanial, P.
Chapin, E.
Chapman, S.
Clements, D. L.
Conley, A.
Conversi, L.
Cooray, A.
Dowell, C. D.
Dunlop, J. S.
Dwek, E.
Eales, S.
Elbaz, D.
Farrah, D.
Franceschini, A.
Glenn, J.
Griffin, M.
Halpern, M.
Hatziminaoglou, E.
Ibar, E.
Isaak, K.
Lagache, G.
Levenson, L.
Lu, N.
Madden, S.
Maffei, B.
Mainetti, G.
Marchetti, L.
Marsden, G.
Morrison, G.
Mortier, A. M. J.
Nguyen, H. T.
O'Halloran, B.
Oliver, S. J.
Omont, A.
Page, M. J.
Panuzzo, P.
Papageorgiou, A.
Pearson, C. P.
Perez-Fournon, I.
Pohlen, M.
Rawlings, J. I.
Raymond, G.
Rigopoulou, D.
Rizzo, D.
Rodighiero, G.
Rowan-Robinson, M.
Schulz, B.
Scott, Douglas
Seymour, N.
Shupe, D. L.
Smith, A. J.
Stevens, J. A.
Symeonidis, M.
Trichas, M.
Tugwell, K. E.
Vaccari, M.
Valtchanov, I.
Vieira, J. D.
Viero, M. P.
Vigroux, L.
Wardlow, J.
Wang, L.
Wright, G.
Xu, C. K.
Zemcov, M.
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Show full item recordAbstract
We investigate the potential of submm-mm and submm-mm-radio photometric redshifts using a sample of mm-selected sources as seen at 250, 350 and 500 {\mu}m by the SPIRE instrument on Herschel. From a sample of 63 previously identified mm-sources with reliable radio identifications in the GOODS-N and Lockman Hole North fields 46 (73 per cent) are found to have detections in at least one SPIRE band. We explore the observed submm/mm colour evolution with redshift, finding that the colours of mm-sources are adequately described by a modified blackbody with constant optical depth {\tau} = ({\nu}/{\nu}0)^{\beta} where {\beta} = +1.8 and {\nu}0 = c/100 {\mu}m. We find a tight correlation between dust temperature and IR luminosity. Using a single model of the dust temperature and IR luminosity relation we derive photometric redshift estimates for the 46 SPIRE detected mm-sources. Testing against the 22 sources with known spectroscopic, or good quality optical/near-IR photometric, redshifts we find submm/mm photometric redshifts offer a redshift accuracy of |z|/(1+z) = 0.16 (= 0.51). Including constraints from the radio-far IR correlation the accuracy is improved to |z|/(1 + z) = 0.15 (= 0.45). We estimate the redshift distribution of mm-selected sources finding a significant excess at z > 3 when compared to ~ 850 {\mu}m selected samples.
Citation
Roseboom, I. G., R. J. Ivison, T. R. Greve, A. Amblard, et al. 2011. "The Herschel Multi-Tiered Extragalactic Survey: SPIRE-mm Photometric Redshifts." Monthly Notices of the Royal Astronomical Society 419:2758.