Asteroseismology for solar analogues 16 Cyg A/B

For these more evolved Sun-like stars we cannot detect surface rotation with the current Kepler data but instead use the technique of asteroseismology to determine rotational properties of both 16 Cyg A and B. We find the rotation periods to be 23.8^1.5^_-1.8_ and 23.2^11.5^_-3.2_ d, and the angles of inclination to be 56^6^_-5_ {deg} and 36^17^_-7_ {deg}, for A and B, respectively.

Together with these results we use the published mass and age to suggest that, under the assumption of a solar-like rotation profile, 16 Cyg A could be used when calibrating gyrochronology relations. In addition, we discuss the known 16 Cyg B star-planet eccentricity and measured low obliquity which is consistent with Kozai cycling and tidal theory.