Oral Presentation

Hyper Suprime-Cam Weak Lensing Measurement of Galaxy Clusters selected by Atacama Cosmology Telescope

Author(s): Hironao Miyatake

Presenter: Hironao Miyatake (Nagoya University)

Galaxy clusters are one of the most powerful cosmological probes because of an exponential tail at the high-mass end of cluster mass function. The accuracy of mass function measurement is currently limited by systematic uncertainties in cluster mass estimates due to an uncertain physical assumption, e.g., hydrostatic equilibrium when using X-ray observables. On the other hand, weak gravitational lensing can provide unbiased mass estimates because of its direct sensitivity to the dark matter distribution around galaxy clusters. In this talk, I will present the weak lensing mass calibration of galaxy clusters detected by Atacama Cosmology Telescope Polarimeter (ACTPol) through the thermal Sunyaev-Zel'dovich (SZ) effect, using the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) first-year data. I will discuss detailed studies of systematic uncertainties and comparison of our mass calibration to previous results in the literature. If possible, I will also present preliminary results from the HSC third-year data and Advanced ACTPol (AdvACT).