Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.3804b&link_type=abstract
American Astronomical Society, DPS meeting #40, #38.04; Bulletin of the American Astronomical Society, Vol. 40, p.464
Astronomy and Astrophysics
Astronomy
Scientific paper
The Centaurs’ orbital evolution is characterized by strong chaos and frequent planetary close encounters. We have investigated the transition between the Centaurs and the Jupiter family comets (JFCs), the latter defined as having Tisserand parameter with respect to Jupiter of 2 < TJ < 3. We find that 80% of the known sample of Centaurs spend part of their dynamical lifetimes as JFCs. The amount of time spent as a JFC is typically on the order of a few hundred thousand years, similar to the dynamical lifetimes of JFCs. We also find that the majority of these objects are "handed off” toward the inner solar system from one giant planet to the next before being ejected. In contrast, the orbital evolution of the Centaurs that spend little or no time as JFCs is either dominated by Saturn or consists largely of hopping among mean motion resonances with Uranus and Neptune. This suggests that the JFCs may originate from a dynamically distinct subset of Centaurs.
Bailey Brenae
Malhotra Renu
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