CARMENES VIS std(RV)–v sin i scatter plot for the 166 stars with n_RV > 10. The points are color-coded according to their Hα luminosity. Stars with only an upper limit of v sin i ≲ 2 km s⁻¹ are marked with arrows: green arrows for host stars of known planetary systems, and black arrows for stars with no detected planets. The open triangles are the median RV uncertainties () of the stars with v sin i > 2 km s⁻¹. For clarity, each triangle is connected by a solid line to its point. The dashed line is the adopted boundary between RV-quiet and RV-loud stars at std(RV) = 10 m s⁻¹.