Tentative evidence for a secondary dependence of ﹩{Q}_{\star }^{{\prime} }﹩ on the stellar spin rate. Shown are the values of ﹩{Q}_{\star }^{{\prime} }﹩ inferred for selected systems, as a function of a dimensionless spin parameter. The blue symbols correspond to systems with tidal periods from 0.7 to 0.9 days, and the orange symbols are for tidal periods from 1.3 to 1.5 days. The blue curve (a power-law dependence) is a fit to blue symbols with two-sided limits. For the orange line, only the offset was fitted, while the slope was forced to be the same as the blue line.