TY - UNPB
T1 - Clustering of red-sequence galaxies in the fourth data release ofthe Kilo-Degree Survey
AU - Vakili, Mohammadjavad
AU - Hoekstra, Henk
AU - Bilicki, Maciej
AU - Fortuna, Maria-Cristina
AU - Kuijken, Konrad
AU - Wright, Angus H.
AU - Asgari, Marika
AU - Brown, Michael
AU - Dombrovskij, Elisabeth
AU - Erben, Thomas
AU - Giblin, Benjamin
AU - Heymans, Catherine
AU - Hildebrandt, Hendrik
AU - Johnston, Harry
AU - Joudaki, Shahab
AU - Kannawadi, Arun
PY - 2020/8/30
Y1 - 2020/8/30
N2 - We present a sample of luminous red-sequence galaxies to study the
large-scale structure in the fourth data release of the Kilo-Degree
Survey. The selected galaxies are defined by a red-sequence template, in
the form of a data-driven model of the colour-magnitude relation
conditioned on redshift. In this work, the red-sequence template is
built using the broad-band optical+near infrared photometry of
KiDS-VIKING and the overlapping spectroscopic data sets. The selection
process involves estimating the red-sequence redshifts, assessing the
purity of the sample, and estimating the underlying redshift
distributions of redshift bins. After performing the selection, we
mitigate the impact of survey properties on the observed number density
of galaxies by assigning photometric weights to the galaxies. We measure
the angular two-point correlation function of the red galaxies in four
redshift bins, and constrain the large scale bias of our red-sequence
sample assuming a fixed $\Lambda$CDM cosmology. We find consistent
linear biases for two luminosity-threshold samples (dense and luminous).
We find that our constraints are well characterized by the passive
evolution model.
AB - We present a sample of luminous red-sequence galaxies to study the
large-scale structure in the fourth data release of the Kilo-Degree
Survey. The selected galaxies are defined by a red-sequence template, in
the form of a data-driven model of the colour-magnitude relation
conditioned on redshift. In this work, the red-sequence template is
built using the broad-band optical+near infrared photometry of
KiDS-VIKING and the overlapping spectroscopic data sets. The selection
process involves estimating the red-sequence redshifts, assessing the
purity of the sample, and estimating the underlying redshift
distributions of redshift bins. After performing the selection, we
mitigate the impact of survey properties on the observed number density
of galaxies by assigning photometric weights to the galaxies. We measure
the angular two-point correlation function of the red galaxies in four
redshift bins, and constrain the large scale bias of our red-sequence
sample assuming a fixed $\Lambda$CDM cosmology. We find consistent
linear biases for two luminosity-threshold samples (dense and luminous).
We find that our constraints are well characterized by the passive
evolution model.
KW - alaxies: distances and redshifts- cosmology: large-scale structure of
KW - Universe- methods: data analysismethods: statistical
U2 - 10.48550/arXiv.2008.13154
DO - 10.48550/arXiv.2008.13154
M3 - Preprint
SP - 1
EP - 21
BT - Clustering of red-sequence galaxies in the fourth data release ofthe Kilo-Degree Survey
PB - arXiv
ER -