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

作者：Davies G R^*; Chaplin W J; Farr W M; Garcia R A; Lund M N; Mathis S; Metcalfe T S; Appourchaux T; Basu S; Benomar O; Campante T L; Ceillier T; Elsworth Y; Handberg R; Salabert D; Stello D

来源：Monthly Notices of the Royal Astronomical Society, 2015, 446(3): 2959-2966.

DOI：10.1093/mnras/stu2331

• planet-star interactions
• stars: oscillations
• stars: rotation

The solar analogues 16 Cyg A and B are excellent asteroseismic targets in the Kepler field of view and together with a red dwarf and a Jovian planet form an interesting system. For these more evolved Sun-like stars we cannot detect surface rotation with the current Kepler data but instead use the technique of asteroseimology to determine rotational properties of both 16 Cyg A and B. We find the rotation periods to be 23.8(-1.8)(+1.5) and 23.2(-3.2)(+11.5) d, and the angles of inclination to be 56(-5)(+6 degrees) and 36(-7)(+17)degrees, 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.

• 出版日期2015-1-21
• 单位中国地震局