Statistics – Computation
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987esasp.278..247k&link_type=abstract
In ESA, Proceedings of the International Symposium on the Diversity and Similarity of Comets p 247-254 (SEE N88-21884 14-91)
Statistics
Computation
2
Anisotropy, Atmospheric Models, Cometary Atmospheres, Gas Dynamics, Halley'S Comet, Neutral Gases, Comet Heads, Comet Nuclei, Comet Tails, Time Dependence
Scientific paper
Observations of Comet Halley indicating a marked asymmetry between the sunward and the tailward-directed part of the neutral gas coma are discussed. This asymmetry seems not to be restricted to the near-nucleus region but persists out to distances of at least several 10,000 km, according to infrared spectroscopic observations. Model calculations simulating the observed asymmetries from a gasdynamical point of view are presented. Conditions where outgassing anisotropies at the nucleus could be maintained out to large distances are considered. Results from a time-dependent computation show the influence of a short, localized gas outburst event on the cometary coma. The measured anisotropy of the water vapor content may be related to such an event.
Huen Ip Wing
Koemle Norbert I.
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