Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...265..817f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 265, no. 2, p. 817-824.
Astronomy and Astrophysics
Astrophysics
9
Astronomical Models, Comet Tails, Cosmic Dust, Velocity Distribution, Charge Coupled Devices, Comet Nuclei, Isophotes, Mathematical Models
Scientific paper
The inverse numerical model of dust tails (Fulle, 1989) is improved by considering a Maxwellian dust velocity distribution. Tests of the new model applied to CCD images of the dust tail of Comet Liller 1988V, with the most probable ejection velocity independent of dust size, demonstrate that dust tail models are sensitive only to the most probable velocity itself, whatever the cause of the velocity dispersion. A comparsion of dust tail fits provided by the single-valued distribution model and the Maxwellian model with the same size dependence leads to the conclusion that such improvements do not introduce appreciable changes in all the results. Thus, the velocities provided in the past by the inverse dust tail model can be interpreted as the most probable values of wide uniomodal velocity distributions.
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