Non-perturbative investigation of low-eccentricity exterior mean motion resonances

Mean motion resonances are important in the analysis and understanding of dynamics planetary systems. While perturbative approaches have been dominant many previous studies, recent non-perturbative revealed novel properties low eccentricity regime for interior mean Jupiter fundamental model circular planar restricted three body model. Here we extend investigation to exterior (up about 0.1) perturber mass range 5e-5 1e-3 (in units central mass). Our results demonstrate that first order two branches at as well low-eccentricity bridges connecting neighboring resonances. With increasing mass, higher dissolve into chaos whereas persist with larger widths their radial extent but smaller azimuthal widths. For resonances, also detect secondary arising from small integer commensurabilities between resonant librations synodic frequency. These contribute significantly generating chaotic sea typically occurs near higher-mass perturbers.