Cosmic Shear constraints from HSC Year 3 with clustering calibration of the tomographic redshift distributions from DESI
astro-ph.CO
Submitted: 2025-11-22
Updated: 2026-09-15
Comments: 25 pages, 8 figures, 2 tables
Code: https://github.com/jeanchdjdev/desiy3-hsc
License: http://creativecommons.org/licenses/by/4.0/
The gist: We reanalyze cosmological constraints from Hyper Suprime-Cam (HSC) Y3 shear-shear correlation function using new calibration of the tomographic redshift distribution via the clustering redshifts
Terminology
Abstract
We reanalyze cosmological constraints from Hyper Suprime-Cam (HSC) Y3 shear-shear correlation function using new calibration of the tomographic redshift distribution via the clustering redshifts method with DESI spectroscopy presented in Choppin de Janvry et al. (2025a). We present both importance sampling of the original MCMC chains by HSC, applying the weights of our newly calibrated Δz priors, as well as full MCMC analysis with new photometric redshift distributions, finding consistent results between the two. We obtain the growth of structure parameter S 8 σ 8 sqrt Ω m/0.3 =0.804 0.019-0.018, compared to previous HSC Y3 result of S 8=0.769+0.031-0.034, which is a 1.8 reduction of error due to the improved clustering redshift calibrations, with the central value shifting considerably higher towards Planck cosmology. With the new photometric redshift calibration, HSC Y3 has comparable constraining power to the recent KIDS Legacy and DES Y6 results.
Sources
- The fifth data release of the Kilo Degree Survey: Multi-epoch optical/NIR imaging covering wide and legacy-calibration fields
- The Dark Energy Survey: more than dark energy - an overview
- Planck 2018 results. VI. Cosmological parameters
- Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Data Calibration
- Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Modeling Uncertainty
- Full calibration of the tomographic redshift distribution from the HSC PDR3 Shape Catalog with DESI
- Unified and consistent structure growth measurements from joint ACT, SPT and \textit{Planck} CMB lensing
- Dark Energy Survey Year 6 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
- The Atacama Cosmology Telescope: DR6 Power Spectra, Likelihoods and $\Lambda$CDM Parameters
- The DESI Experiment Part II: Instrument Design
- DES Y3 + KiDS-1000: Consistent cosmology combining cosmic shear surveys
- Photometric redshifts and intrinsic alignments: degeneracies and biases in 3$\times$2pt analysis
- A non-linear solution to the $S_8$ tension?
- Linear cosmological constraints on 2-body decaying dark matter scenarios and the $S_8$ tension
- LSST: from Science Drivers to Reference Design and Anticipated Data Products
- Euclid. I. Overview of the Euclid mission
- Overview of the Instrumentation for the Dark Energy Spectroscopic Instrument
- Hyper Suprime-Cam Y3 results: photo-$z$ bias calibration with lensing shear ratios and cosmological constraints from cosmic shear
- Second Data Release of the Hyper Suprime-Cam Subaru Strategic Program
- Hyper Suprime-Cam Year 3 Results: Cosmology from Cosmic Shear Two-point Correlation Functions
Related papers
- Angular clustering and bias of photometric quasars in the Kilo-Degree Survey Data Release 4
- A Novel kinetic Sunyaev-Zel'dovich Estimator for Electron-Electron Correlations
- Magnetic fields at the dawn of structure formation I. The CARLA J1510+5958 proto-cluster
- Dark Energy Survey Year 6 Results: Weak Lensing and Galaxy Clustering Cosmological Analysis Framework
- Exploring the Impact of Systematic Bias in Type Ia Supernova Cosmology Across Diverse Dark Energy Parametrizations
- Non-Gaussian Galaxy Stochasticity and the Noise-Field Formulation