The scattered disk population as a source of Oort cloud comets: evaluation of its current and past role in populating the Oort cloud

Details The scattered disk population as a source of Oort cloud comets: evaluation of its current and past role in populating the Oort cloud The scattered disk population as a source of Oort cloud comets: evaluation of its current and past role in populating the Oort cloud

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004icar..172..372f&link_type=abstract

Icarus, Volume 172, Issue 2, p. 372-381.

Mathematics

Probability

22

Scientific paper

We have integrated the orbits of the 76 scattered disk objects (SDOs), discovered through the end of 2002, plus 399 clones for 5 Gyr to study their dynamical evolution and the probability of falling in one of the following end states: reaching Jupiter's influence zone, hyperbolic ejection, or transfer to the Oort cloud. We find that nearly 50% of the SDOs are transferred to the Oort cloud (i.e., they reach heliocentric distances greater than 20,000 AU in a barycentric elliptical orbit), from which about 60% have their perihelia beyond Neptune's orbit (31 AU1 km incorporated into the Oort cloud is about 5 yr-1, which might be a non-negligible fraction of comet losses from the Oort cloud (probably around or even above 10%). Therefore, we conclude that the Oort cloud may have experienced and may be even experiencing a significant renovation of its population, and that the trans-neptunian belt—via the scattered disk—may be the main feeding source.

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