Secular resonance of inner test particles in hierarchical planetary systems

Abstract

The present work studies the secular resonance associated with the critical argument $\sigma =\varpi$ ($\varpi$ is the longitude of pericentre) for inner test particles moving in low-eccentricity region with inclination $i$ smaller than $39^{\circ }$. To formulate the dynamical model, the double-averaged Hamiltonian is formulated up to an arbitrary order in the semimajor axis ratio, and then those high-order periodic terms are removed from the double-averaged Hamiltonian by means of Hori--Deprit transformation technique. The resulting Hamiltonian determines a resonant model with a single degree of freedom. Based on the resonant model, it becomes possible to explore the phase-space structure, resonant centre, and resonant width in an analytical manner. In particular, an excellent correspondence is found between the resonant width in terms of the eccentricity variation and the maximum variation of eccentricity ($\Delta e$) for test particles initially placed on quasi-circular orbits. It means that the secular dynamics in the low-eccentricity space with $i<39^{\circ }$ is dominantly governed by the secular resonance associated with $\sigma =\varpi$.

11 pages, 7 figures. Accepted for publication in MNRAS

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Cited by in corpus (4)

• A systematic study about orbit flips of test particles caused by eccentric von Zeipel-Lidov-Kozai effects
• Extremely Inclined Orbit of S-type Planet $\gamma$ Cep Ab Induced by Eccentric Kozai-Lidov Mechanism
• Dynamical essence of the eccentric von Zeipel-Lidov-Kozai effect in restricted hierarchical planetary systems
• Structures of secular resonances for inner test particles in hierarchical planetary systems