TY - JOUR
T1 - Cosmological constraints from cosmic shear two-point correlation functions with HSC survey first-year data
AU - Hamana, Takashi
AU - Shirasaki, Masato
AU - Miyazaki, Satoshi
AU - Hikage, Chiaki
AU - Oguri, Masamune
AU - More, Surhud
AU - Armstrong, Robert
AU - Leauthaud, Alexie
AU - Mandelbaum, Rachel
AU - Miyatake, Hironao
AU - Nishizawa, Atsushi J.
AU - Simet, Melanie
AU - Takada, Masahiro
AU - Aihara, Hiroaki
AU - Bosch, James
AU - Komiyama, Yutaka
AU - Lupton, Robert
AU - Murayama, Hitoshi
AU - Strauss, Michael A.
AU - Tanaka, Masayuki
N1 - Funding Information:
The Hyper Suprime-Cam (HSC) collaboration includes the astronomical communities of Japan and Taiwan, and Princeton University. The HSC instrumentation and software were developed by the National Astronomical Observatory of Japan (NAOJ), the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), the University of Tokyo, the High Energy Accelerator Research Organization (KEK), the Academia Sinica Institute for Astronomy and Astrophysics in Taiwan (ASIAA), and Princeton University. Funding was contributed by the FIRST program from Japanese Cabinet Office, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), the Japan Society for the Promotion of Science (JSPS), Japan Science and Technology Agency (JST), the Toray Science Foundation, NAOJ, Kavli IPMU, KEK, ASIAA, and Princeton University. This paper makes use of software developed for the Large Synoptic Survey Telescope. We thank the LSST Project for making their code available as free software at 〈http://dm.lsst.org〉.
Funding Information:
This work was supported in part by World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan, JSPS KAKENHI Grant Number JP15H05887, JP15H05892, JP15H05893, 17H06600, JP17K05457, 18H04350, 18H04358, and JP18K03693. A portion of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. RMa is supported by the Department of Energy Cosmic Frontier program, grant DE-SC0010118.
Funding Information:
The Pan-STARRS1 Surveys (PS1) have been made possible through contributions of the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max-Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, Queen’s University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, the National Aeronautics and Space Administration under Grant No. NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation under Grant No. AST-1238877, the University of Maryland, and Eotvos Lorand University (ELTE) and the Los Alamos National Laboratory.
Publisher Copyright:
© 2020 The Author(s) 2019. Published by Oxford University Press on behalf of the Astronomical Society of Japan. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
PY - 2020/2/1
Y1 - 2020/2/1
N2 - We present measurements of cosmic shear two-point correlation functions (TPCFs) from Hyper Suprime-Cam Subaru Strategic Program (HSC) first-year data, and derive cosmological constraints based on a blind analysis. The HSC first-year shape catalog is divided into four tomographic redshift bins ranging from z=0.3 to 1.5 with equal widths of Δ z =0.3. The unweighted galaxy number densities in each tomographic bin are 5.9, 5.9, 4.3, and 2.4-2 from the lowest to highest redshifts, respectively. We adopt the standard TPCF estimators, ξ ±, for our cosmological analysis, given that we find no evidence of significant B-mode shear. The TPCFs are detected at high significance for all 10 combinations of auto-and cross-tomographic bins over a wide angular range, yielding a total signal-to-noise ratio of 19 in the angular ranges adopted in the cosmological analysis, 7'<θ <56' for ξ + and 28'<θ <178' for ξ_. We perform the standard Bayesian likelihood analysis for cosmological inference from the measured cosmic shear TPCFs, including contributions from intrinsic alignment of galaxies as well as systematic effects from PSF model errors, shear calibration uncertainty, and source redshift distribution errors. We adopt a covariance matrix derived from realistic mock catalogs constructed from full-sky gravitational lensing simulations that fully account for survey geometry and measurement noise. For a flat Λ cold dark matter model, we find {equation presented}. We carefully check the robustness of the cosmological results against astrophysical modeling uncertainties and systematic uncertainties in measurements, and find that none of them has a significant impact on the cosmological constraints.
AB - We present measurements of cosmic shear two-point correlation functions (TPCFs) from Hyper Suprime-Cam Subaru Strategic Program (HSC) first-year data, and derive cosmological constraints based on a blind analysis. The HSC first-year shape catalog is divided into four tomographic redshift bins ranging from z=0.3 to 1.5 with equal widths of Δ z =0.3. The unweighted galaxy number densities in each tomographic bin are 5.9, 5.9, 4.3, and 2.4-2 from the lowest to highest redshifts, respectively. We adopt the standard TPCF estimators, ξ ±, for our cosmological analysis, given that we find no evidence of significant B-mode shear. The TPCFs are detected at high significance for all 10 combinations of auto-and cross-tomographic bins over a wide angular range, yielding a total signal-to-noise ratio of 19 in the angular ranges adopted in the cosmological analysis, 7'<θ <56' for ξ + and 28'<θ <178' for ξ_. We perform the standard Bayesian likelihood analysis for cosmological inference from the measured cosmic shear TPCFs, including contributions from intrinsic alignment of galaxies as well as systematic effects from PSF model errors, shear calibration uncertainty, and source redshift distribution errors. We adopt a covariance matrix derived from realistic mock catalogs constructed from full-sky gravitational lensing simulations that fully account for survey geometry and measurement noise. For a flat Λ cold dark matter model, we find {equation presented}. We carefully check the robustness of the cosmological results against astrophysical modeling uncertainties and systematic uncertainties in measurements, and find that none of them has a significant impact on the cosmological constraints.
KW - cosmological parameters
KW - cosmology: observations
KW - dark matter
KW - large-scale structure of universe
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U2 - 10.1093/pasj/psz138
DO - 10.1093/pasj/psz138
M3 - Article
AN - SCOPUS:85082554733
SN - 0004-6264
VL - 72
JO - Publications of the Astronomical Society of Japan
JF - Publications of the Astronomical Society of Japan
IS - 1
M1 - 16
ER -