Artículos de revistas
Dark Energy Survey Year 3 results: Galaxy clustering and systematics treatment for lens galaxy samples
Fecha
2022-04-01Registro en:
Monthly Notices of the Royal Astronomical Society, v. 511, n. 2, p. 2665-2687, 2022.
1365-2966
0035-8711
10.1093/mnras/stac104
2-s2.0-85125469692
Autor
Medioambientales y Tecnologicas (CIEMAT)
University of Michigan
The Ohio State University
Institut d'Estudis Espacials de Catalunya (IEEC)
S/n
Instituto de Astrofisica de Canarias
Laboratorio Interinstitucional de E-Astronomia-LIneA
Dpto. Astrofísica
Universidade Estadual Paulista (UNESP)
Universidad Autonoma de Madrid
University of WisconsinMadison
University of Pennsylvania
Northeastern University
Observatoire de Sauverny
Lawrence Berkeley National Laboratory
Carnegie Mellon University
Santa Cruz Institute for Particle Physics
University of Arizona
University of Oslo
California Institute of Technology
University of Cambridge
The Barcelona Institute of Science and Technology
National Center for Supercomputing Applications
University of Illinois at Urbana-Champaign
University of Geneva
Fermi National Accelerator Laboratory
Stanford University
The University of Tokyo
University of Chicago
Slac National Accelerator Laboratory
382 Via Pueblo Mall
University of Portsmouth
University of Hawai'i
Institut d'Astrophysique de Paris
University of Sussex
University College London
University of Manchester
School of Physics and Astronomy
University of Trieste
INAF-Osservatorio Astronomico di Trieste
Institute for Fundamental Physics of the Universe
Observatorio Nacional
Iit Hyderabad
University of Queensland
Center for Astrophysics | Harvard &smithsonian
Macquarie University
Lowell Observatory
Universidade de São Paulo (USP)
Texas A &m University
Peyton Hall
Institucio Catalana de Recerca i Estudis Avancats
Ludwig-Maximilians-Universitat
Max Planck Institute for Extraterrestrial Physics
University of Southampton
Oak Ridge National Laboratory
Ludwig-Maximilians Universitat Munchen
Institución
Resumen
In this work, we present the galaxy clustering measurements of the two DES lens galaxy samples: a magnitude-limited sample optimized for the measurement of cosmological parameters, maglim, and a sample of luminous red galaxies selected with the redmagic algorithm. maglim/redmagic sample contains over 10 million/2.5 million galaxies and is divided into six/five photometric redshift bins spanning the range z [0.20, 1.05]/z [0.15, 0.90]. Both samples cover 4143 °2 over which we perform our analysis blind, measuring the angular correlation function with an S/N ∼63 for both samples. In a companion paper, these measurements of galaxy clustering are combined with the correlation functions of cosmic shear and galaxy-galaxy lensing of each sample to place cosmological constraints with a 3 × 2pt analysis. We conduct a thorough study of the mitigation of systematic effects caused by the spatially varying survey properties and we correct the measurements to remove artificial clustering signals. We employ several decontamination methods with different configurations to ensure the robustness of our corrections and to determine the systematic uncertainty that needs to be considered for the final cosmology analyses. We validate our fiducial methodology using lognormal mocks, showing that our decontamination procedure induces biases no greater than 0.5σ in the (ωm, b) plane, where b is the galaxy bias.