The California Planet Survey III. A Possible 2:1 Resonance in the Exoplanetary Triple System HD 37124

摘要: We present new radial velocities from Keck Observatory and both Newtonian Keplerian solutions for the triple-planet system orbiting HD 37124. The orbital solution this has improved dramatically since third planet was first reported in Vogt et al. 2005 with an ambiguous period. have resolved ambiguity, outer two planets apparent period commensurability of 2:1. A dynamical analysis finds resonant non-resonant configurations consistent velocity data, constrains mutual inclinations to be less than about 30 degrees. discuss 37124 context other 19 exoplanetary systems commenserabilities, which we summarize a table. show that roughly one three well-characterized multiplanet low-order commensuribility, is more would naively expected if periods exoplanets known were drawn randomly observed distribution planetary periods.