On the dust boundary at Halley and volatility of cometary organics

Details On the dust boundary at Halley and volatility of cometary organics On the dust boundary at Halley and volatility of cometary organics

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.500..579o&link_type=abstract

In: Proceedings of Asteroids, Comets, Meteors - ACM 2002. International Conference, 29 July - 2 August 2002, Berlin, Germany. Ed

Computer Science

Comets, Dust, Organic Matter

Scientific paper

The dust boundary observed at Halley is a phenomenon which originated due to disintegration of aggregates of cometary dust. Based on the boundary properties, a model has been developed (Oberc 1996), assuming that the disintegration was caused by sublimation of a volatile compound gluing particles in dust aggregates. The model allows to derive from observations the sublimation parameters, in particular the latent heat; a more straightforward way of deriving them is presented here. Furthermore, it is shown that the obtained sublimation parameters are in good agreement with formula derived by Krueger et al. (1991) for vapour pressures of complex cometary organics, such as polymers, that evaporated from dust and were observed in the gas phase.

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