TY - JOUR
T1 - KiDS+VIKING-450
T2 - A new combined optical and near-infrared dataset for cosmology and astrophysics
AU - Wright, Angus H.
AU - Hildebrandt, Hendrik
AU - Kuijken, Konrad
AU - Erben, Thomas
AU - Blake, Robert
AU - Buddelmeijer, Hugo
AU - Choi, Ami
AU - Cross, Nicholas
AU - de Jong, Jelte T. A.
AU - Edge, Alastair
AU - Gonzalez-Fernandez, Carlos
AU - González Solares, Eduardo
AU - Grado, Aniello
AU - Heymans, Catherine
AU - Irwin, Mike
AU - Kupcu Yoldas, Aybuke
AU - Lewis, James R.
AU - Mann, Robert G.
AU - Napolitano, Nicola
AU - Radovich, Mario
AU - Schneider, Peter
AU - Sifón, Cristóbal
AU - Sutherland, William
AU - Sutorius, Eckhard
AU - Verdoes Kleijn, Gijs A.
PY - 2019/10/16
Y1 - 2019/10/16
N2 - We present the curation and verification of a new combined optical and near infrared dataset for cosmology and astrophysics, derived by combining ugri-band imaging from the Kilo-Degree Survey (KiDS) and ZYJHKs-band imaging from the VISTA Kilo degree Infrared Galaxy (VIKING) survey. This dataset is unrivaled in cosmological imaging surveys due to the combination of its area (458 deg2 before masking), depth (r ≤ 25), and wavelength coverage (ugriZYJHKs). This combination of survey depth, area, and (most importantly) wavelength coverage allows significant reductions in systematic uncertainties (i.e. reductions of between 10% and 60% in bias, outlier rate, and scatter) in photometric-to-spectroscopic redshift comparisons, compared to the optical-only case at photo-z above 0.7. The complementarity between our optical and near infrared surveys means that over 80% of our sources, across all photo-z, have significant detections (i.e. not upper limits) in our eight reddest bands. We have derived photometry, photo-z, and stellar masses for all sources in the survey, and verified these data products against existing spectroscopic galaxy samples. We demonstrate the fidelity of our higher-level data products by constructing the survey stellar mass functions in eight volume-complete redshift bins. We find that these photometrically derived mass functions provide excellent agreement with previous mass evolution studies derived using spectroscopic surveys. The primary data products presented in this paper are made publicly available through the KiDS survey website. The catalogs are also available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz- bin/cat/J/A+A/632/A34
AB - We present the curation and verification of a new combined optical and near infrared dataset for cosmology and astrophysics, derived by combining ugri-band imaging from the Kilo-Degree Survey (KiDS) and ZYJHKs-band imaging from the VISTA Kilo degree Infrared Galaxy (VIKING) survey. This dataset is unrivaled in cosmological imaging surveys due to the combination of its area (458 deg2 before masking), depth (r ≤ 25), and wavelength coverage (ugriZYJHKs). This combination of survey depth, area, and (most importantly) wavelength coverage allows significant reductions in systematic uncertainties (i.e. reductions of between 10% and 60% in bias, outlier rate, and scatter) in photometric-to-spectroscopic redshift comparisons, compared to the optical-only case at photo-z above 0.7. The complementarity between our optical and near infrared surveys means that over 80% of our sources, across all photo-z, have significant detections (i.e. not upper limits) in our eight reddest bands. We have derived photometry, photo-z, and stellar masses for all sources in the survey, and verified these data products against existing spectroscopic galaxy samples. We demonstrate the fidelity of our higher-level data products by constructing the survey stellar mass functions in eight volume-complete redshift bins. We find that these photometrically derived mass functions provide excellent agreement with previous mass evolution studies derived using spectroscopic surveys. The primary data products presented in this paper are made publicly available through the KiDS survey website. The catalogs are also available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz- bin/cat/J/A+A/632/A34
KW - cosmology: observations
KW - gravitational lensing: weak
KW - galaxies: photometry
KW - surveys
KW - Astrophysics - Cosmology and Nongalactic Astrophysics
KW - Astrophysics - Astrophysics of Galaxies
KW - Astrophysics - Instrumentation and Methods for Astrophysics
KW - PHOTOMETRIC REDSHIFTS
KW - PANCHROMATIC PHOTOMETRY
KW - COSMIC SHEAR
KW - DEEP SURVEY
KW - FAR-UV
KW - GALAXY
KW - STELLAR
KW - FIELD
KW - EVOLUTION
KW - SAMPLE
U2 - 10.1051/0004-6361/201834879
DO - 10.1051/0004-6361/201834879
M3 - Article
SN - 0004-6361
VL - 632
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - A34
ER -