Cometary ice texture and the thermal evolution of comets

Details Cometary ice texture and the thermal evolution of comets Cometary ice texture and the thermal evolution of comets

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..15r..35s&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 15, no. 10, p. 35-38

Computer Science

19

Comets, Evolution (Development), Ice, Space Environment Simulation, Temperature Effects, Temperature Profiles, Thermal Analysis, Comet Nuclei, Compressive Strength, In Situ Measurement, Thermal Conductivity, Thermal Environments

Scientific paper

KOmetenSImulation (KOSI) comet simulation experiments have shown strong evidence for significant modifications of the texture of porous ice within typical experiment durations of a few ten hours. Initially, the textures of the fluffy ice samples were obviously not in their equilibrium states. During the cause of the experiments textures modified through growth of the bond sizes between individual grains which causes significant increases in compressive strength and intrinsic thermal conductivity. The near-surface layers of cometary nuclei may evolve similarly as they are heated during perihelion passage. As a consequence, the heat wave may penetrate into increasingly deeper layers to depths greater than generally expected.

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