Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.3404c&link_type=abstract
American Astronomical Society, DPS meeting #38, #34.04; Bulletin of the American Astronomical Society, Vol. 38, p.546
Astronomy and Astrophysics
Astronomy
1
Scientific paper
The Kuiper Belt, the Scattered Disk and the Oort Cloud are dynamically distinct populations of small bodies evolving in the outer regions of the Solar System. Using a hybrid approach (Charnoz & Morbidelli 2003), we try to couple the primordial collisional and dynamical evolution of these three populations in a self-consistent way. We show that the initial planetesimal size distribution that allows an effective mass depletion of the Kuiper Belt by collisional grinding, would decimate also the population of comet-size bodies that end in the Oort Cloud and in the Scattered Disk. These two reservoirs would therefore be too anemic, by a factor 40 to 100, relative to the estimates achieved from the observation of the fluxes of long period and jupiter family comets, respectively. For these two reservoirs to have a sufficient number of comets, the initial size distribution in the planetesimal disk had to be such that the mass depletion by collisional erosion of in the Kuiper belt was negligible.
Charnoz Sebastien
Morbidelli Alessandro
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