Ratiosof exoplanet orbital periods (P_orbit) to the rotation periods of their host stars (P_rot) for exoplanets that have been observed in radial velocity only. The exoplanet orbit eccentricity is given on the vertical axis. The dashed lines indicate the expected ratios P_orbit ∕P_rot for the m = 2 and m = 3 sectoral r modes of stellar oscillations. Exoplanets with ratios close to these values are potential false positives and are labeled with the number listed in the top table and plotted in red with error bars.