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The solar analogs 16 Cyg A and 16 Cyg B are excellent asteroseismic targetsin the \Kepler field of view and together with a red dwarf and a Jovian planetform an interesting system. For these more evolved Sun-like stars we cannotdetect surface rotation with the current \Kepler data but instead use thetechnique of asteroseimology to determine rotational properties of both 16 CygA and B. We find the rotation periods to be $23.8^{+1.5}_{-1.8} \rm \, days$and $23.2^{+11.5}_{-3.2} \rm \, days$, and the angles of inclination to be$56^{+6}_{-5} \, ^{\circ}$ and $36^{+17}_{-7} \, ^{\circ}$, for A and Brespectively. Together with these results we use the published mass and age tosuggest that, under the assumption of a solar-like rotation profile, 16 Cyg Acould be used when calibrating gyrochronology relations. In addition, wediscuss the known 16 Cyg B star-planet eccentricity and measured low obliquitywhich is consistent with Kozai cycling and tidal theory.

Asteroseismic inference on rotation, gyrochronology and planetary system dynamics of 16 Cygni