2025/12/15 by Oguri, Masamune, Lin, Yen-Ting, Okabe, Nobuhiro +9
#Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences
paper · doi:10.48550/arxiv.2512.13954
We construct samples of optically-selected clusters and photometric luminous red galaxies (LRGs) from the Hyper Suprime-Cam Subaru Strategic Program final year dataset covering ∼ 1200~deg2. The cluster catalogs extend out to the redshift of 1.38 and contain more than 10000 clusters with richness larger than 15, where the richness is defined to be a membership probability weighted number of galaxies above the stellar masses of approximately 1010.2M_\odot. The total number of probable red cluster member galaxies in these clusters are more than 6× 105. Photometric redshifts of the clusters are shown to be precise with the scatter better than ∼ 0.01 for a wide redshift range. We detect stacked weak lensing signals of clusters out to the redshift of 1, and use them to update constraints on the mass-richness relation. Our catalog of about 6 million photometric LRGs extend out to the redshift of 1.25, and have the scatter of the photometric redshift better than ∼ 0.02 for the redshift range between 0.4 and 1.0.