Posterior distribution diagrams for M1 and M2. The corner plots depict the posterior distribution for the equatorial rotation period, stellar axis inclination, differential rotation coefficient, local CB velocity, and projected spin-orbit angle. The black contour lines represent (from the center outward) the confidence intervals enclosing 68.27%, 95.45%, and 99.73% of the accepted samples. The histograms display the parameter posterior distributions, with the darker dashed line indicating the median value and lighter lines delimiting the 1-sigma interval.