Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photometric redshifts for the next generation of deep radio continuum
  surveys - II. Gaussian processes and hybrid estimates   Building on the first paper in this series (Duncan et al. 2018), we present a
study investigating the performance of Gaussian process photometric redshift
(photo-z) estimates for galaxies and active galactic nuclei detected in deep
radio continuum surveys. A Gaussian process redshift code is used to produce
photo-z estimates targeting specific subsets of both the AGN population -
infrared, X-ray and optically selected AGN - and the general galaxy population.
The new estimates for the AGN population are found to perform significantly
better at z > 1 than the template-based photo-z estimates presented in our
previous study. Our new photo-z estimates are then combined with template
estimates through hierarchical Bayesian combination to produce a hybrid
consensus estimate that outperforms either of the individual methods across all
source types. Photo-z estimates for radio sources that are X-ray sources or
optical/IR AGN are signficantly improved in comparison to previous
template-only estimates, with outlier fractions and robust scatter reduced by
up to a factor of ~4. The ability of our method to combine the strengths of the
two input photo-z techniques and the large improvements we observe illustrate
its potential for enabling future exploitation of deep radio continuum surveys
for both the study of galaxy and black hole co-evolution and for cosmological
studies.

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The categories of this paper are: gr-qc
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The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
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The categories of this paper are: math
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The categories of this paper are: physics
12
The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: nlin
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The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas