Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989icar...80..267c&link_type=abstract
Icarus (ISSN 0019-1035), vol. 80, Aug. 1989, p. 267-279. Research supported by CNR.
Astronomy and Astrophysics
Astronomy
27
Astronomical Photometry, Cometary Atmospheres, Halley'S Comet, Astronomical Models, Coma, Giotto Mission, Gravitational Fields, Interplanetary Dust, Radiation Pressure, Comets, Halley, Photometry, Dust, Size, Distribution, Ejection, Models, Velocity, Anisotropy, Structure, Imagery, Comet Tails, Bennett, Geometry, Theoretical Studies, Calculations
Scientific paper
The Fulle and Sedmak (1988) quantitative analysis of Neck-Line Structures (NLSs) is presently applied to the dust streamer and the real antitail noted in images obtained for Comet Halley during April-June, 1986. Results for the dust size distribution at very large sizes, the time-dependent dust velocity ejection velocity from the inner coma, and the anisotropy of dust are related to the January 10-18, 1986 interval. The power index of the size distribution fitting the NLS isophotes is -4.0 for 0.2-2.0 mm, and -0.4 for 2-10 mm; the strong excess of large dust suggested by McDonnell, et al. (1987) to account for the Giotto data is therefore confirmed.
Cremonese Gabriele
Fulle Marco
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