ЭФФЕКТЫ ХАОТИЧЕСКОЙ «РАСЧИСТКИ» В ПЛАНЕТНЫХ СИСТЕМАХ

The main types of chaotic clearing effects in planetary systems are considered. The clearing consists in the formation of orbital zones free from low-mass bodies (planetesimals, asteroids, particles, fragments), due to the dynamical chaotization in the presence of perturbations. The effects include: (1) the coorbital clearing – the formation of a ring-like clearance in the planetesimal disk due to the accumulation and overlap of «particle–planet» orbital (mean-motion) resonances of the first order in the radial neighborhood of a planetary orbit (Wisdom, 1980; Demidova, Shevchenko, 2016); (2) the circumbinary clearing – the formation of a whole circular clearance in the planetesimal disk around a binary star due to the overlap of «particle–binary» integer orbital resonances accumulating to the separatrix corresponding to the parabolic motion (Shevchenko, 2015); (3) the circumnuclear clearing – the formation of a whole circular clearance in the cloud of particles and fragments around a rotating irregularly-shaped body (contact binary, such as cometary nuclei, many objects in the Kuiper belt, and asteroids) due to the overlap of «particle – contact binary» integer orbital resonances, accumulating to the separatrix corresponding to the parabolic motion (Lages et al., 2017, 2018). Particular attention is paid to the latter case, as identified just recently. The research was supported by the RAS Presidium Program «Nonlinear dynamics: fundamental problems and applications».