2023/04/12 by Leander Thiele, Thiele, Leander, Gabriela A. Marques +5
Agricultural and Biological Sciences · Physics and Astronomy · #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Leaf Properties and Growth Measurement #Scientific Research and Discoveries
paper · pdf · doi:10.48550/arxiv.2304.05928
openalex publication_date 2023/04/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We utilize the probability distribution function (PDF) of normalized convergence maps reconstructed from the Subaru Hyper Suprime-Cam (HSC) Y1 shear catalogue, in combination with the power spectrum, to measure the matter clustering amplitude S8=σ8√(Ωm/0.3). The large-scale structure's statistical properties are incompletely described by the traditional two-point statistics, motivating our investigation of the PDF -- a complementary higher-order statistic. By defining the PDF over the standard deviation-normalized convergence map we are able to isolate the non-Gaussian information. We use tailored simulations to compress the data vector and construct a likelihood approximation. We mitigate the impact of survey and astrophysical systematics with cuts on smoothing scales, redshift bins, and data vectors. We find S8=0.860+0.066-0.109 from the PDF alone and S8=0.798+0.029-0.042 from the combination of PDF and power spectrum (68% CL). The PDF improves the power spectrum-only constraint by about 10%.