HR: 0830h
AN: SH21B-0107    [PDF]
TI: Bow Shock in Interaction of Solar Wind with Dusty Cometary Coma
AU: * Losseva, T V
EM: losseva@idg.chph.ras.ru
AF: Institute of Geosperes Dynamic RAS, 38 Leninsky prosp. (bldg. 1), Moscow, 119334 Russian Federation
AU: Gisko, A A
EM: 260577@mail.ru
AF: Prokhorov Institute of General Physics RAS, Vavilova 38, Moscow, 119991 Russian Federation
AU: Popel, S I
EM: popel@idg.chph.ras.ru
AF: Institute of Geosperes Dynamic RAS, 38 Leninsky prosp. (bldg. 1), Moscow, 119334 Russian Federation
AU: Vladimirov, S V
EM: vladimi@physics.usyd.edu.au
AF: School of Physics, University of Sydney, NSW, Sydney, 2006 Australia
AB: The process of interaction of Solar wind with dusty cometary coma is considered. The description is performed on the basis of a self-consistent model which takes into account solar radiation; dust particle charging; evaporation and formation of neutral particles; photoionization; electric fields; the evolution of Solar wind ions, cometary ions and dust particles; as well as the dust charge variation. It is shown that the presence of dust in cometary coma can modify shock wave formed as a result of Solar wind interaction with a comet. The outer shock wave (bow shock) can be considered as an ion acoustic shock wave modified by dust particle charging process. Possible formation of dust structures in the region of the interaction of Solar wind with cometary coma is discussed. The developed model allows us to determine the shock front structure. For large enough dust densities (exceeding $10^6$ cm$^{-3}$ near the comet nucleus) at the region of bow shock front dust particles acquiring positive variable charges influence drastically the structure of the shock front. Its width is in accordance with the theory of dust ion acoustic shocks [1, 2]. The work is supported by the Russian Foundation for Basic Research (grants No. 02-02-17369, 03-02-16664, 03-05-64813). [1] S.I. Popel, M.Y. Yu, and V.N. Tsytovich, Phys. Plasmas 3, 4313 (1996). [2] S.I. Popel, A.A. Gisko, A.P. Golub', and T.V. Losseva et al. Phys. Plasmas 7, 2410 (2000).
DE: 2164 Solar wind plasma
DE: 6025 Interactions with solar wind plasma and fields
DE: 6210 Comets
DE: 7851 Shock waves
DE: 7867 Wave/particle interactions
SC: SPA - Solar and Heliospheric Physics [SH]
MN: 2003 Fall Meeting