Left: $V_{\mathrm{PEC}}^{2\mathrm{D}}$ distributions for the slow-rotating (unfilled turquoise bars) and fast-rotating (filled pale red bars) stars with a bin size of 5 km s⁻¹ for the rotation sample (top), the runaway stars (middle) and normal stars (bottom). Right: Cumulative distribution functions of $V_{\mathrm{PEC}}^{2\mathrm{D}}$ for the slow- (turquoise) and fast-rotating (pale red) stars for the rotation sample (top), the runaway stars (middle), and the normal stars (bottom). The curves in light colors show the corresponding empirical cumulative distribution functions. The numbers of fast and slow rotators are shown between parentheses. p_KS are the corresponding p values resulting from the KS tests.