The Outer Stellar Mass of Massive Galaxies: A Simple Tracer of Halo Mass with Scatter Comparable to Richness and Reduced Projection Effects

Using the weak gravitational lensing data from the Hyper Suprime-Cam Subaru Strategic Program (HSC survey), we study the potential of different stellar mass estimates in tracing halo mass. We consider galaxies with \log {M_{\star}/M_{\odot}}>11.5 at 0.2 < z < 0.5 with carefully measured light profiles and clusters from the redMaPPer... Show more