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Photometric redshifts for the next generation of deep radio continuum surveys - I: template fitting
journal contribution
posted on 2023-06-09, 08:42 authored by Kenneth J Duncan, Michael J I Brown, Wendy L Williams, Philip N Best, Veronique Buat, Denis Burgarella, Matt J Jarvis, Katarzyna Malek, Seb OliverSeb Oliver, Huub J A Röttgering, Daniel J B SmithWe 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 Boötes and COSMOS fields, we assess photometric redshift (photo-z) performance for a sample of 4; 500 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 which equals or improves upon the performance of any individual template set.
History
Publication status
- Published
File Version
- Accepted version
Journal
Monthly Notices Of The Royal Astronomical SocietyISSN
0035-8711Publisher
Oxford University PressExternal DOI
Issue
2Volume
473Page range
2655-2672Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-11-07First Open Access (FOA) Date
2017-11-07First Compliant Deposit (FCD) Date
2017-11-07Usage metrics
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