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Ice Particle Emission from Cometary Analogues

  • H. Kohl (a1) and E. Grün (a1)

Abstract

Dust particles originating from comets are an important constituent of the interplanetary dust regime. In order to study the ejection mechanisms from the cometary nucleus surface simulation experiments in the laboratory have been performed. Samples consisting of water ice, carbon dioxide ice and dust grains have been studied when they are irradiated by artificial sunlight within a cooled vacuum system. It has been shown that particle emission is extremely dependent on the initial composition of the samples. For samples with a distinct amount of non-volatile, mineral particles the formation of a dust mantle and, as a consequence, rapid decrease of particle ejection has been observed.

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References

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Grün, E., Kochan, H. and Seidensticker, K. (1990) ’Laboratory simulation, a tool for comet research’, Geophys. Res. Lett., in press
Kohl, H., Grün, E., and Weishaupt, U. (1990) ’A new method for analyzing low velocity particle impacts’, Planet. Space Sci. 38, 567573
Storrs, A.D., Fanale, F.P., Saunders, R.S. and Stephens, J.B. (1988) ’The formation of filamentary sublimate residues (FSR) from mineral grains’, Icarus 76, 493512
Thiel, K., Kölzer, G., Kochan, H., Grün, E., Kohl, H., and Bremer, K. (1990) ’New results of the dust investigations in the comet simulation project KOSI’, Proceedings of the 21st Lunar and Planetary Science Conference, Houston, March 1990, in press

Ice Particle Emission from Cometary Analogues

  • H. Kohl (a1) and E. Grün (a1)

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