Physics
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1447s&link_type=abstract
EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1447
Physics
Scientific paper
Collisions are the central process in planet formation. Because of the diverse range of possible outcomes (cratering, merging, disruption, hit-and-run, and erosive hit-and-run events) and variations in the material properties of planetary bodies, no general set of equations exist to capture the basic physics of collisions. At present, collisions outcomes in planet formation simulations are applicable only to a specific subset of possible collision parameters (e.g., perfect merging or disruption of specific types of planetary bodies). Based on new simulations and scaling laws, [1] and this paper present a complete analytic description of the dynamical outcome for any collision between gravity-dominated bodies (100's m planetesimals to planets). All collision outcomes are described in terms of the impact conditions and the catastrophic disruption criteria, Q RD, the specific energy required to disperse half the total colliding mass [2]. This paper presents the general catastrophic disruption law and its implications for planet formation.
Leinhardt Zoë M.
Stewart Sarah T.
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