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Photometric redshifts for the next generation of deep radio continuum surveys - I: Template fitting

Authors :
Lo Faro, B.
Buat, Veronique
Roehlly, Y.
Alvarez-Marquez, J.
Burgarella, Denis
Silva, L.
Efstathiou, A.
Duncan, Kenneth
Brown, Michael
Williams, Wendy
Best, Philip
Jarvis, Matt
Małek, Katarzyna
Oliver, S.
Röttgering, Huub
Smith, Daniel
Laboratoire d'Astrophysique de Marseille (LAM)
Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)
Source :
Duncan, K J, Brown, M J I, Williams, W L, Best, P N, Buat, V, Burgarella, D, Jarvis, M J, Małek, K, Oliver, S J, Röttgering, H J A & Smith, D J B 2017, ' Photometric redshifts for the next generation of deep radio continuum surveys-I. Template fitting ', Monthly Notices of the Royal Astronomical Society, vol. 473, no. 2, pp. 2655-2672 . https://doi.org/10.1093/mnras/stx2536, Monthly Notices of the Royal Astronomical Society, 473(2), 2655-2672, Monthly Notices of the Royal Astronomical Society, Monthly Notices of the Royal Astronomical Society, 2018, 473 (2), pp.2655-2672. ⟨10.1093/mnras/stx2536⟩, Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2018, 473 (2), pp.2655-2672. ⟨10.1093/mnras/stx2536⟩
Publication Year :
2017

Abstract

We present a study of photometric redshift performance for galaxies and active galactic nuclei detected in deep radio continuum surveys. Using two multi-wavelength datasets, over the NOAO Deep Wide Field Survey Bo\"otes and COSMOS fields, we assess photometric redshift (photo-z) performance for a sample of $\sim 4,500$ radio continuum sources with spectroscopic redshifts relative to those of $\sim 63,000$ non radio-detected sources in the same fields. We investigate the performance of three photometric redshift template sets as a function of redshift, radio luminosity and infrared/X-ray properties. We find that no single template library is able to provide the best performance across all subsets of the radio detected population, with variation in the optimum template set both between subsets and between fields. Through a hierarchical Bayesian combination of the photo-z estimates from all three template sets, we are able to produce a consensus photo-z estimate which equals or improves upon the performance of any individual template set.<br />Comment: 20 pages, 17 figures. Accepted for publication in MNRAS

Details

Language :
English
ISSN :
00358711 and 13652966
Database :
OpenAIRE
Journal :
Duncan, K J, Brown, M J I, Williams, W L, Best, P N, Buat, V, Burgarella, D, Jarvis, M J, Małek, K, Oliver, S J, Röttgering, H J A & Smith, D J B 2017, ' Photometric redshifts for the next generation of deep radio continuum surveys-I. Template fitting ', Monthly Notices of the Royal Astronomical Society, vol. 473, no. 2, pp. 2655-2672 . https://doi.org/10.1093/mnras/stx2536, Monthly Notices of the Royal Astronomical Society, 473(2), 2655-2672, Monthly Notices of the Royal Astronomical Society, Monthly Notices of the Royal Astronomical Society, 2018, 473 (2), pp.2655-2672. ⟨10.1093/mnras/stx2536⟩, Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2018, 473 (2), pp.2655-2672. ⟨10.1093/mnras/stx2536⟩
Accession number :
edsair.doi.dedup.....2fa02b59efe39f146656c103194a258e
Full Text :
https://doi.org/10.1093/mnras/stx2536