MCMC “corner plot” for the kinematic modeling of HZ4. Figure shows the 1D and 2D projections of the posterior probability distributions of the four free parameters: the total baryonic mass (M_bar), the effective radius (R_e), the dark-matter fraction within one effective radius (f_DM(≤R_e)), and the intrinsic velocity dispersion (σ₀). For Gaussian priors, the centers are marked with orange lines. The maximum a posteriori values of each parameter (found by jointly analyzing the posteriors of all parameters; the “best-fit” values) are shown with blue squares and lines. For the 2D histograms, the contours correspond to the 1, 2, and 3σ confidence intervals. For the 1D histograms, the uncertainties are the shortest interval enclosing or 1σ of the marginalized posterior distribution.