Collisional evolution of the early asteroid belt |
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| Affiliation: | 1. Université de Lyon, Ens de Lyon, CNRS, Université Lyon 1, Laboratoire de Sciences de la Terre, 15 parvis René Descartes, 69007, France;2. Department of Geology & Geophysics, Yale University, PO Box 208109, New Haven, CT 06520–8109, USA;1. Institute for Astronomy, ETH Zürich, Wolfgang-Pauli-Strasse 27, Zürich 8093, Switzerland;2. Institute of Geophysics, ETH Zürich, Sonneggstrasse 5, Zürich 8092, Switzerland;3. Bayerisches Geoinstitut, University of Bayreuth, Universitätsstrasse 30, Bayreuth 95440, Germany |
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| Abstract: | We present numerical results obtained by a simulation of the collisional process between asteroids and scattered comets from the Uranus–Neptune zone. This mechanism allows the use of single exponent incremental size distributions for the initial belt reaching a final distribution that matches the observed population very well. Since the cometary bombardment was extremely efficient removing mass from the primordial asteroid belt in a very short time, we always obtained belts with total masses less than 0.001 M⊕ after ≈ 2×107 yrs. This result allows processes with an important initial mass preserving Vestas basaltic crust. |
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