Numerical Simulation Of The Neutral And Electrically Charged Dust Distribution In The Coma Of Comet 67P/Churyumov-Gerasimenko.

Details Numerical Simulation Of The Neutral And Electrically Charged Dust Distribution In The Coma Of Comet 67P/Churyumov-Gerasimenko. Numerical Simulation Of The Neutral And Electrically Charged Dust Distribution In The Coma Of Comet 67P/Churyumov-Gerasimenko.

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.2837t&link_type=abstract

American Astronomical Society, DPS meeting #42, #28.37

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Scientific paper

Being the target of the Rosetta mission, comet 67P/Churyumov-Gerasimenko is the object of both theoretical and practical interest. With the lack of detailed knowledge of the comet and its coma, a prediction of their properties has to be done by means of numerical modeling.
Here we investigate the effect of dust charging on its distribution in the coma. The most important process that causes a grain charging is its interaction with the surrounding plasma (mainly plasma of the solar wind). Other processes that determine the distribution of dust in the coma include gravity of the nucleus, drag force by the gas and the Lorentz force. At large cometo-centric distances, the combined effect of solar gravity and solar radiation pressure defines the direction of the dust tail.
For simulating the dust flow we use our Monte-Carlo model, where dust grains are represented by a set of model particles acted upon by forces and physical processes listed above. Accounting for the major physical processes, our kinetic model is applicable for the whole range of grain sizes.
In this work we present a detailed analysis of the neutral/charged dust distribution in the coma of comet 67P/Churyumov-Gerasimenko at heliocentric distances relevant to the Rosetta mission. The dust distribution is considered both in the innermost as well as in the far regions of the coma. The mechanism that leads to formation of jet-like spikes in the dust density near edges of gas jets is examined.

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