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| Título: | H-ATLAS: Estimating redshifts of herschel sources from sub-mm fluxes |
Autor: | Pearson, E. A.; Eales, S.; González-Nuevo, J. CSIC ORCID; Maddox, S. J.; Baes, M.; Baker, A. J.; Zotti, G. de; Harris, A. I.; Ivison, R. J.; Jarvis, Matt J.; Lapi, Andrea; Michalowski, M. J.; Valtchanov, Iván | Fecha de publicación: | 2013 | Editor: | Oxford University Press Royal Astronomical Society |
Citación: | Monthly Notices of the Royal Astronomical Society 435(4): 2753-2763 (2013) | Resumen: | Upon its completion, the Herschel Astrophysics Terahertz Large Area Survey (H-ATLAS) will be the largest sub-millimetre survey to date, detecting close to half-a-million sources. It will only be possible to measure spectroscopic redshifts for a small fraction of these sources. However, if the rest-frame spectral energy distribution (SED) of a typical H-ATLAS source is known, this SED and the observed Herschel fluxes can be used to estimate the redshifts of the H-ATLAS sources without spectroscopic redshifts. In this paper, we use a sub-set of 40 H-ATLAS sources with previously measured redshifts in the range 0.5 < z < 4.2 to derive a suitable average template for high-redshift H-ATLAS sources. We find that a template with two dust components (Tc = 23.9K, Th = 46.9K and ratio of mass of cold dust to mass of warm dust of 30.1) provides a good fit to the rest-frame fluxes of the sources in our calibration sample. We use a jackknife technique to estimate the accuracy of the redshifts estimated with this template, finding a root mean square of Δz/(1 + z) = 0.26. For sources for which there is prior information that they lie at z > 1, we estimate that the rms of Δz/(1 + z) = 0.12. We have used this template to estimate the redshift distribution for the sources detected in the H-ATLAS equatorial fields, finding a bimodal distribution with a mean redshift of 1.2, 1.9 and 2.5 for 250, 350 and 500 μm selected sources, respectively. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. | Descripción: | The Herschel-ATLAS project.-- et al. | Versión del editor: | http://dx.doi.org/10.1093/mnras/stt1369 | URI: | http://hdl.handle.net/10261/109223 | DOI: | 10.1093/mnras/stt1369 | Identificadores: | doi: 10.1093/mnras/stt1369 issn: 0035-8711 e-issn: 1365-2966 |
| Aparece en las colecciones: | (IFCA) Artículos |
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| Fichero | Descripción | Tamaño | Formato | |
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| sources from sub-mm fluxes.pdf | 5,56 MB | Adobe PDF |  Visualizar/Abrir |
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