The High Eccentricity of the Planet Orbiting 16 Cygni B

摘要: We consider the high eccentricity, 0.63, of newly discovered planet orbiting 16 Cyg B, using fact that parent star is part a wide binary. show eccentricity could be result tidal forces exerted on B and its by A, distant companion in system. By following numerically stellar triple systems with parameters similar to those Cyg, we have established orbital gone through strong modulation, an amplitude 0.8 or even larger, typical timescale tens millions years. The modulation strongly depends relative inclination between plane motion binary AB. To account for present planet, assume angle two planes large, at least 60°. argue this assumption not unreasonable binaries like