Exploring the 7:4 mean motion resonance—I: Dynamical evolution of classical transneptunian objects

Lykawka, Patryk Sofia; Mukai, Tadashi

doi:10.1016/j.pss.2004.12.015

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Exploring the 7:4 mean motion resonance—I: Dynamical evolution of classical transneptunian objects

Lykawka, Patryk Sofia & Mukai, Tadashi (2005)

Published: Sep 1, 2005
DOI: 10.1016/j.pss.2004.12.015

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At a GlanceAI

The 7:4 resonance in the classical belt is weakly chaotic and keeps exciting and mixing TNO orbits to this day.

SummaryAI

Motivated by a density gap and color anomalies near the 7:4 resonance (a about 43.7 au), the authors follow almost 10,000 test particles under the four giant planets for the age of the Solar System. The resonance is weakly chaotic: most resonant particles get their eccentricities and inclinations pumped, stable locking is rare, and particles typically escape after reaching e about 0.2, on 10^8-10^9 yr timescales. Only 12-15% of real 7:4 TNOs are expected to be retained, and classical objects near the resonance keep evolving and mixing until today.

Method SnapshotAI

Numerical integration of test particles over 4-5 Gyr with a chaotic diffusion experiment.

BackgroundAI

Mean-motion resonances and chaotic diffusion.

In Collections

Astronomy33 papers

The trans-Neptunian region: surveys, populations and dynamics

The region beyond Neptune holds leftovers of planet formation, and its orbital structure is a record of how the giant planets migrated. This collection goes from the systematic surveys that built the modern census (Deep Ecliptic Survey, CFEPS, OSSOS, the Dark Energy Survey search) through dynamical classification of thousands of objects and population estimates for Neptune's resonances, to resonance sticking, the scattered disk, the coupling between Kozai (ZLK) dynamics and mean-motion resonances, and the distant clustered orbits. It ends with what the next surveys (DEEP, CLASSY, LSST) are designed to answer. Terms: * TNO: trans-Neptunian object * MMR: mean-motion resonance * ZLK(R): von Zeipel-Lidov-Kozai (resonance) * DES: two different projects share this acronym here, the Deep Ecliptic Survey (2002, 2005) and the Dark Energy Survey (2022)

Evgeny Smirnov