The dynamical origin of the multi-planetary system HD 45364

摘要: The recently discovered planetary system HD 45364, which consists of a Jupiter and Saturn-mass planet, is very likely in 3:2 mean motion resonance. standard scenario for forming commensurabilities convergent migration two planets embedded protoplanetary disc. When the are initially separated by period ratio larger than two, will most lead to stable 2:1 Rapid type III outer planet crossing resonance one possible way around this problem. In paper, we investigate idea detail. We present an estimate required rate confirm with N-body hydrodynamical simulations. If dynamical history had phase rapid inward that forms resonant configuration, predict orbital parameters always be similar thus should show evidence that. use from our simulation calculate radial velocity curve compare it observations. Our model provides fit as good previously reported one. eccentricities both considerably smaller libration pattern different. Within few years, observe planet-planet interaction directly distinguish between these different states.