Laboratory Simulations: The Primordial Comet Mantle

Details Laboratory Simulations: The Primordial Comet Mantle Laboratory Simulations: The Primordial Comet Mantle

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997arcn.rept..255j&link_type=abstract

Analysis of Returned Comet Nucleus Samples, Proceedings of a Workshop held at Milpitas, California, 16-18 January, 1989. Compil

Computer Science

Comets, Crusts, Refractories, Ice, Galactic Structure, Simulation, Tensile Strength, Thickness, Samples, Solar System, Cosmic Rays

Scientific paper

Laboratory data are needed to understand the formation of organics in cometary and precometary materials and for deciding on the fate of the volatiles. Appropriate experiments were described in the talk at Milipitas. Because of its importance for the comet sample return mission, I discuss here the relevance of this data for predicting the thickness, nature, and ability to survive of the cosmic-ray produced primordial comet mantle ('crust'). That part of the mantle which becomes predominantly refractory is approx. 30 gm/sq cm thick. The tensile strength of this outer mantle is such that it might survive the comet's entrance into the inner solar system. In addition, important modifications to the ices occur to depths approx. 300 gm/cu cm. Based on this it is expected that a deep probe is needed to obtain minimally altered material.

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