The Long-Term Evolution of J2/1, J3/2 and J4/3 Resonant Asteroids During Planetary Migration and Beyond

Details The Long-Term Evolution of J2/1, J3/2 and J4/3 Resonant Asteroids During Planetary Migration and Beyond The Long-Term Evolution of J2/1, J3/2 and J4/3 Resonant Asteroids During Planetary Migration and Beyond

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.5306b&link_type=abstract

American Astronomical Society, DPS meeting #38, #53.06; Bulletin of the American Astronomical Society, Vol. 38, p.582

Astronomy and Astrophysics

Astronomy

Scientific paper

The asteroids observed on long-lived orbits inside low-order mean motion resonances provide a unique opportunity to study early stages of the Solar System evolution. E.g., the stability of resonant orbits might be violated when planets migrate due to interactions with a massive disc of remaining planetesimals.
We provide a complete update of resonant populations based on recent orbital catalogues. There are approximately 150 long-lived objects in the J2/1 resonance, 1000 in the J3/2 and only a few objects in J4/3. We classify them according to their dynamical lifetimes, as inferred from N-body simulations spanning 4 Gyr, and we present available physical properties and size-frequency distributions for the respective sub-groups. We compute long-term orbital evolution of resonant bodies driven by slow chaotic diffusion, the Yarkovsky effect and collisions. We also test the stability of the resonant orbits under the influence of various mutual resonances between Jupiter and Saturn (1:2, 3:7, 4:9, 2:5), which were possibly encountered during the planetary migration period.

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