Water clusters in the coma of Comet Halley and their effect on the gas density, temperature, and velocity

Details Water clusters in the coma of Comet Halley and their effect on the gas density, temperature, and velocity Water clusters in the coma of Comet Halley and their effect on the gas density, temperature, and velocity

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...84..414c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 84, April 1990, p. 414-446. Research sponsored by CNRS and CNES.

Physics

20

Comet Nuclei, Gas Density, Gas Temperature, Halley'S Comet, Water, Cometary Atmospheres, Condensing, Dimers, Flow Velocity, Giotto Mission, Mass Spectroscopy, Vaporizing, Comets, Water, Comae, Halley, Gases, Density, Temperature, Velocity, Atmosphere, Condensation, Physical Properties, Vapor, Calculations, Concentration, Nucleation, Kinetics, Geometry, Time Dependency, Dust, Parameters, Depletion, Perturbations, Sublimation, Ice

Scientific paper

The present investigation of water cluster formation by water recondensation in an expanding cometary atmosphere employs several competing algorithms and produces numerical estimates appropriate for Comet Halley at the time of the flyby observations. The predictions of a 15 percent water recondensation into 100-1000 water molecule clusters, and of the clusters' disappearance beyond 500 nucleus radii, are only weakly sensitive to existing uncertainties about both the nucleation process mathematical model and the water clusters' physical properties. A strong perturbation of the water radial temperature profile at all altitudes is anticipated to be an observable effect of these large clusters.

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