Weak-lensing mass calibration of Planck Sunyaev--Zel'dovich clusters with HSC-SSP Year 3

arXiv:2606.17984 · astro-ph.CO · Submitted 2026-06-16 · Read on arXiv

Andrés Alejandro Plazas Malagón, Hironao Miyatake, Surhud More, Nicholas Battaglia, Eunseong Lee, Neta Bahcall

astro-ph.CO

Submitted: 2026-06-16

Comments: 27 pages, 10 figures, submitted to PRD

License: http://creativecommons.org/licenses/by/4.0/

The gist: We present a weak gravitational lensing mass calibration of 19 Planck Sunyaev--Zel'dovich (SZ) selected galaxy clusters using shape measurements from the Hyper Suprime-Cam Subaru Strategic Program

Terminology

Abstract

We present a weak gravitational lensing mass calibration of 19 Planck Sunyaev--Zel'dovich (SZ) selected galaxy clusters using shape measurements from the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) Year 3 shape catalog. We measure the stacked weak-lensing signal (R) using per-cluster lensing weights that match the measurement pipeline's stacking scheme, and construct an analytical covariance matrix that includes shape noise and projected large-scale structure contributions. Our primary constraint on the SZ mass bias comes from a forward-modeling approach that integrates over the halo mass function while accounting for the Planck SZ selection function, Eddington bias from log-normal scatter in the SZ mass proxy, and cluster miscentering. Fitting four free parameters, the log mass bias (1-b), the miscentered fraction f mis, the offset scale sigma off, and the SZ scatter sigma M, over the radial range 0.5 -- 5.0,h-1, Mpc, we obtain 1-b = 0.73+0.10-0.11 with chi 2/dof = 5.2/5 at an effective redshift z eff 0.24. This measurement is consistent with recent weak-lensing calibrations of SZ-selected clusters and supports the picture that significant mass bias corrections are required to reconcile cluster abundance measurements with primary cosmic microwave background constraints on cosmological parameters.

Sources

Related papers