Computer Science
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981m%26p....25..397h&link_type=abstract
Moon and the Planets, vol. 25, Dec. 1981, p. 397-412.
Computer Science
10
Comet Nuclei, Comets, Emission Spectra, Gas Composition, Interplanetary Dust, Carbon Dioxide, Carbon Monoxide, Interplanetary Gas, Particle Size Distribution, Solar Wind, Spatial Distribution
Scientific paper
Alternative processes of dust emission from comets at large heliocentric distances are considered, in order to explain the dust coma observed in comet Bowell (1980b) at a heliocentric distance as large as 7.17 AU. It is shown that the electrostatic blow-off of dust from a charged, H2O-dominated nucleus having a layer of loose, fine dust may be the formation process of the dust coma, with the coma size expected from the process being comparable to the observed value and the dust grain size being equal to or less than 0.4 microns in size. The upper limit for the total mass in the coma is 3.9 x 10 to the 8th g, and the spatial extension less than 10,000 km. The observed activity may alternatively be due to dust entrainment by the sublimating gas from a CO2-dominated nucleus.
Houpis Harry L. F.
Mendis Asoka D.
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