Physics
Scientific paper
Jun 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aeri.repts....c&link_type=abstract
Annual Report, 1 Jun. 1984 - 31 May 1985 Atmospheric and Environmental Research, Inc., Cambridge, MA.
Physics
Cometary Atmospheres, Comets, Radicals, Spatial Distribution, Comet Nuclei, Comet Tails, Elastic Scattering, Monte Carlo Method, Particle Trajectories, Photochemical Reactions, Radiation Pressure, Solar Radiation
Scientific paper
Progress on modeling the spatial distributions of cometary radicals is described. The Monte Carlo particle-trajectory model was generalized to include the full time dependencies of initial comet expansion velocities, nucleus vaporization rates, photochemical lifetimes and photon emission rates which enter the problem through the comet's changing heliocentric distance and velocity. The effect of multiple collisions in the transition zone from collisional coupling to true free flow were also included. Currently available observations of the spatial distributions of the neutral radicals, as well as the latest available photochemical data were re-evaluated. Preliminary exploratory model results testing the effects of various processes on observable spatial distributions are also discussed.
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