University of Hertfordshire

From the same journal

From the same journal

By the same authors

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

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  • 1709

    Accepted author manuscript, 1.48 MB, PDF document

  • Kenneth J. Duncan
  • Michael J. I. Brown
  • Wendy L. Williams
  • Philip N. Best
  • Veronique Buat
  • Denis Burgarella
  • Matt J. Jarvis
  • Katarzyna Malek
  • S. J. Oliver
  • Huub J. A. Rottgering
  • Daniel J. B. Smith
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Original languageEnglish
Pages (from-to)2655-2672
Number of pages18
JournalMonthly Notices of the Royal Astronomical Society
Volume473
Issue2
Early online date2 Oct 2017
DOIs
Publication statusPublished - 11 Jan 2018

Abstract

We present a study of photometric redshift performance for galaxies and active galactic nuclei detected in deep radio continuum surveys. Using two multiwavelength data sets, over the NOAO Deep Wide Field Survey Boötes and COSMOS fields, we assess photometric redshift (photo-z) performance for a sample of ~4500 radio continuum sources with spectroscopic redshifts relative to those of ~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 that equals or improves upon the performance of any individual template set.

Notes

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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