HAT-P-30 corner plot for differential stellar rotation, assuming a stellar inclination pointing towards the line-of-sight (DR, 0 ≤ i_* ≤ 90); displayed are the one and two dimensional projections of the posterior probability distributions and their corresponding log-normal likelihood estimates. Vertical dashed lines correspond to the median values and their respective 1σ uncertainties calculated from the 16th, 50th, and 84th percentiles of the samples.