Abstract The experimental results on high-velocity impacts reported in the literature are analyzed in detail, with the purpose: (a) to check the possibility of applying to asteroidal collisions, without a size-dependent scaling, the critical energy densities associated with various degrees of fragmentation; (b) to ascertain which fraction of the projectile's energy is converted into kinetic energy of fragments after a catastrophic breakup. The results of our analysis on these two problems indicate that: (a) the critical energy density is independent on size only for super-catastrophic events, when no massive core survives, while it slowly decreases for larger targets when the fragmentation is only partial (barely-catastrophic collisions). Therefore the “energy gap” between cratering and complete distruction is probably wider for the asteroids than for the small experimental targets. (b) the inelasticity coefficient (i.e., the resulting fraction of kinetic energy) depends both on the impact velocity and on the projectile-to-target mass ratio; for asteroidal catastrophic collisions, it probably ranges from 10−2 to 10−1.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    The critical energy density and the inelasticity coefficient for asteroidal catastrophic collisions


    Beteiligte:
    Paolicchi, P. (Autor:in) / Farinella, P. (Autor:in) / Zappalà, V. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 2 , 12 ; 235-238


    Erscheinungsdatum :

    01.01.1983


    Format / Umfang :

    4 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Energy Partitioning in Catastrophic Collisions

    Ryan, E. V. / Davis, D. R. / Lunar and Planetary Institute| National Aeronautics and Space Administration| Universities Space Research Association | British Library Conference Proceedings | 1994


    Energy Partitioning in Catastrophic Collisions

    Ryan, E. V. / Davis, D. R. / Lunar and Planetary Institute et al. | British Library Conference Proceedings | 1994




    Review of asteroidal dynamics

    Scholl, H. | Elsevier | 1985