paper

E/B mode decomposition of HSC-Y1 cosmic shear using COSEBIs: cosmological constraints and comparison with other two-point statistics

arXiv:2201.12698 · doi:10.1093/pasj/psac046

Abstract

We perform a cosmic shear analysis of HSC survey first-year data (HSC-Y1) using Complete Orthogonal Sets of E/B-Integrals (COSEBIs) to derive cosmological constraints. We compute E/B-mode COSEBIs from cosmic shear two-point correlation functions measured on an angular range of $4\arcmin<θ<180\arcmin$. We perform the standard Bayesian likelihood analysis for cosmological inference from the measured E-mode COSEBIs, including contributions from intrinsic alignments of galaxies as well as systematic effects from point spread function model errors, shear calibration uncertainties, and source redshift distribution errors. We adopt a covariance matrix derived from realistic mock catalogs constructed from full-sky gravitational lensing simulations that fully take account of the survey geometry and measurement noise. For a flat cold dark matter model, we find . 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. We also find that the measured B-mode COSEBIs are consistent with zero. We examine, using mock HSC-Y1 data, the consistency of our constraints with those derived from the other cosmic shear two-point statistics, the power spectrum analysis by Hikage et al (2019) and the two-point correlation function analysis by Hamana et al (2020), which adopt the same HSC-Y1 shape catalog, and find that all the constraints are consistent with each other, although expected correlations between derived constraints are weak.

arXiv comment23 pages, 19 figures, accepted for PASJ. arXiv admin note: substantial text overlap with arXiv:1906.06041

References in corpus (53)

Cited by in corpus (4)