Parent stars of extrasolar planets – XV. Host star rotation revisited with Kepler data

We employed published rotation periods of Kepler field stars to test whether stars hosting planets tend to rotate more slowly than stars without known planets. Spectroscopic v sin i observations of nearby stars with planets have indicated that they tend to have smaller v sin i values. We employ data for Kepler Objects of Interest (KOIs) from the first 16 quarters of its original mission; stellar parameters are based on the analysis of the first 17 quarters. We confirm that KOI stars rotate more slowly with much greater confidence than we had previously found for nearby stars with planets. Furthermore, we find that stars with planets of all types rotate more slowly, not just stars with giant planets.