Histogram showing the jitter of 233 CARMENES stars. Slowly rotating stars (v sin i ≤ 2 km s⁻¹; striped blue bars) have a median jitter of 2.3 m s⁻¹ (dashed blue line), and fast-rotating stars (v sin i > 2 km s⁻¹; filled red bars) have a median jitter of 37 m s⁻¹ (dashed red line). The median jitter for all stars is 3.1 m s⁻¹ (solid green line). Six stars with negative jitter variances are not shown.