# Planck Sunyaev-Zel'dovich Cluster Mass Calibration using Hyper Suprime-Cam Weak Lensing

## TL;DR

This study uses Subaru HSC survey data to measure weak lensing around five Planck galaxy clusters, calibrating their masses and examining the mass bias, which has implications for cosmological models.

## Contribution

First weak lensing mass calibration of Planck clusters using Subaru HSC data, providing insights into mass bias and cosmological tensions.

## Key findings

- Mean WL mass of clusters: (4.15±0.61)×10^{14} M_sun/h
- Mass bias ratio: 0.80±0.14, consistent with previous studies
- Detection of the stacked WL signal at 15σ significance

## Abstract

Using $\sim$140 deg$^2$ Subaru Hyper Suprime-Cam (HSC) survey data, we stack the weak lensing (WL) signal around five Planck clusters found within the footprint. This yields a 15$\sigma$ detection of the mean Planck cluster mass density profile. The five Planck clusters span a relatively wide mass range, $M_{\rm WL,500c} = (2-30)\times10^{14}\,M_\odot/h$ with a mean mass of $M_{\rm WL,500c} = (4.15\pm0.61)\times10^{14}\,M_\odot/h$. The ratio of the stacked Planck Sunyaev-Zel'dovich (SZ) mass to the stacked WL mass is $ \langle M_{\rm SZ}\rangle/\langle M_{\rm WL}\rangle = 1-b = 0.80\pm0.14$. This mass bias is consistent with previous WL mass calibrations of Planck clusters within the errors. We discuss the implications of our findings for the calibration of SZ cluster counts and the much discussed tension between Planck SZ cluster counts and Planck $\Lambda$CDM cosmology.