The outflow speed of the coma of Halley's comet

Details The outflow speed of the coma of Halley's comet The outflow speed of the coma of Halley's comet

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989icar...81...41c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 81, Sept. 1989, p. 41-50.

Physics

56

Comet Tails, Flow Velocity, Free Flow, Halley'S Comet, Molecular Flow, Gas Dynamics, Giotto Mission, Comets, Halley, Comae, Flow, Models, Parameters, Dust, Gases, Dynamics, Spacecraft Observations, Giotto Mission, Nms Instrument, Kao Aircraft, Aircraft Observations, Symmetry, Doppler Methods, Distance, Radio Methods, Hydrogen Cyanide

Scientific paper

Data concerning the outflow speed of the coma of Comet Halley are studied in relation to a generalization of the coupled pure-gas-dynamic/Monte Carlo model of Combi and Smyth (1988) to include the dusty-gas dynamics of the inner coma. Measurements made by the Giotto neutral-gas spectrometer, IR water observations from the Kuiper Airborne Observatory, and Doppler radio line profiles of HCN and OH are used to examine the radial dependence of the outflow speed, the asymmetry in the outflow speed, and the overall heliocentric distance dependence of the Doppler profiles, respectively. The results suggest that the model makes it possible to understand the gross long-term behavior and radial structure of the dynamics of the cometary coma.

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