Cosmological Studies from HSC-SSP Tomographic Weak Lensing Peak Abundances

Abstract

We perform weak lensing tomographic peak studies using the first-year shear data from Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) survey. The effective area used in our analyses after field selection, mask and boundary exclusions is $\sim 58{°}^2$. The source galaxies are divided into low- and high-redshift bins with $0.2\le z_p\le 0.85$ and $0.85\le z_p\le 1.5$, respectively. We utilize our halo-based theoretical peak model including the projection effect of large-scale structures to derive cosmological constraints from the observed tomographic high peak abundances with the signal-to-noise ratio in the range of ${\nu }_{\mathrm{N}}=[3.5,5.5]$. These high peaks are closely associated with the lensing effects of massive clusters of galaxies. Thus the inclusion of their member galaxies in the shear catalog can lead to significant source clustering and dilute their lensing signals. We account for this systematic effect in our theoretical modelling. Additionally, the impacts of baryonic effects, galaxy intrinsic alignments, as well as residual uncertainties in shear and photometric redshift calibrations are also analyzed. Within the flat $\Lambda$CDM model, the derived constraint is $S_8=0.758_{-0.076}^{+0.033}$ and $0.768_{-0.057}^{+0.030}$ with the source clustering information measured from the two cluster catalogs, CAMIRA and WZL, respectively. The asymmetric uncertainties are due to the different degeneracy direction of $({\Omega }_{\mathrm{m}},{\sigma }_8)$ from high peak abundances comparing to that from the cosmic shear two-point correlations which give rise approximately the power index $\alpha =0.5$. Fitting to our constraints, we obtain $\alpha \approx 0.38$ and ${\Sigma }_8=0.772_{-0.032}^{+0.028}$ (CAMIRA) and $0.781_{-0.033}^{+0.028}$ (WZL). In comparison with the results from non-tomographic peak analyses, the $1\sigma$ uncertainties on ${\Sigma }_8$ are reduced by a factor of $\sim 1.3$.

19 pages, 11 figures, accepted for publication in MNRAS

References in corpus (20)

• Why your model parameter confidences might be too optimistic -- unbiased estimation of the inverse covariance matrix
• Dark energy constraints from cosmic shear power spectra: impact of intrinsic alignments on photometric redshift requirements
• The Canadian Cluster Comparison Project: detailed study of systematics and updated weak lensing masses
• The Intrinsic Alignment of Galaxies and its Impact on Weak Gravitational Lensing in an Era of Precision Cosmology
• Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -I. Methodology and a Fast Fitting Algorithm
• CFHTLenS: Cosmological constraints from a combination of cosmic shear two-point and three-point correlations
• KiDS-450: Cosmological Constraints from Weak Lensing Peak Statistics - II: Inference from Shear Peaks using N-body Simulations
• Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -II. Application to Simulations
• KiDS-450: Cosmological Constraints from Weak Lensing Peak Statistics-I: Inference from Analytical Prediction of High Signal-to-Noise Ratio Convergence Peaks
• Cosmological Constraints From Weak Lensing Peak Statistics With CFHT Stripe 82 Survey
• Constraints on the Alignment of Galaxies in Galaxy Clusters from $\sim$14,000 Spectroscopic Members
• Constraining $f(R)$ Gravity Theory Using Weak Lensing Peak Statistics from the Canada-France-Hawaii-Telescope Lensing Survey
• Estimating Luminosities and Stellar Masses of Galaxies Photometrically without Determining Redshifts
• A catalogue of clusters of galaxies identified from all sky surveys of 2MASS, WISE, and SuperCOSMOS
• Cosmological constraints from Subaru weak lensing cluster counts
• Photometric redshifts for galaxies in the Subaru Hyper Suprime-Cam and unWISE and a catalogue of identified clusters of galaxies
• Measuring the Cosmic Shear in Fourier Space
• Intrinsic alignments of galaxies and their effects on weak lensing detections of mass concentrations
• Effects of galaxy intrinsic alignment on weak lensing peak statistics
• A fast empirical method for galaxy shape measurements in weak lensing surveys

Cited by in corpus (1)

• Weak lensing peak statistics -- steepness versus height