| タイトル | The Herschel Multi-Tiered Extragalactic Survey: SPIRE-mm Photometric Redshifts |
| 本文（外部サイト） | http://hdl.handle.net/2060/20120002648 |
| 著者（英） | Castro-Rodriguez, N.; Dowell, C. D.; Ivison, R. J.; Cooray, A.; Aussel, H.; Conversi, L.; Boselli, A.; Clements, D. L.; Auld, R.; Bock, J.; Brisbin, D.; Cava, A.; Blain, A.; Bethermin, M.; Chanial, P.; Greve, T. R.; Buat, V.; Amblard, A.; Chapin, E.; Dwek, E.; Chapman, S.; Burgarella, D.; Conley, A.; Arumugam, V.; Roseboom, I. G. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2011-11-18 |
| 言語 | eng |
| 内容記述 | We investigate the potential of submm-mm and submm-mm-radio photometric red-shifts using a sample of mm-selected sources as seen at 250, 350 and 500 micrometers 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 micrometers. 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 |delta z|/(1+z) = 0.16 (less than |delta z| greater than = 0.51). Including constraints from the radio-far IR correlation the accuracy is improved to |delta z|/(1 + z) = 0.15 (less than |delta z| greater than = 0.45). We estimate the redshift distribution of mm-selected sources finding a significant excess at z greater than 3 when compared to 850 micrometer selected samples. |
| NASA分類 | Astronomy |
| レポートNO | GSFC.JA.5683.2011 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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