Physics
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..346v&link_type=abstract
EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.346
Physics
Scientific paper
The Haumea family is so far the only identified collisional family in the Kuiper belt [1]. The formation of the family occurred at least 1 Gyr ago, but it most likely occurred in the primordial Kuiper belt as collision probabilities are exceedingly low in the current Kuiper belt [4]. Here we examine the long-term dynamical evolution of hypothetical family members to assess how the dynamical coherence (velocity dispersion) and number of members within the family are preserved over Gyr timescales. We find that for initial velocity dispersions of 150 - 400 ms-1, approximately 20-45% of the family members will be lost to close encounters with Neptune after 3.5 Gyr of orbital evolution. The remaining members' orbital elements diffuse over short timescales ( 10 Myr) to produce 50-100 ms-1 scatter in their velocities relative to the collision's center-of-mass orbit; family members that become trapped in mean motion resonances (MMRs) with Neptune diffuse even further from the original orbit.
Malhotra Renu
Volk Kathryn
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