Halo mass–satellite velocity dispersion relation. The open (solid) diamonds show the velocity dispersion (σ_s) of satellites versus the host halo masses for total (star-forming) central galaxies. The halo masses are measured from DECaLS lensing data. Different colors indicate different stellar mass bins of central galaxies. The error bars for halo mass indicate the 16% and 84% of the posterior distribution obtained from the MCMC fitting to the stacked lensing profiles. The error bars for σ_s represent the 16% and 84% of the posterior distribution obtained from the fitting to the distribution of the satellite-central velocity difference. The solid line represents the best fit to the data points for the total galaxy sample.