Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987esasp.278..385f&link_type=abstract
In ESA, Proceedings of the International Symposium on the Diversity and Similarity of Comets p 385-389 (SEE N88-21884 14-91)
Astronomy and Astrophysics
Astronomy
Comet Tails, Comets, Goodness Of Fit, Kinematics, Striation, Astronomical Models, Plasma Control, Velocity Distribution, West Comet
Scientific paper
The motion of the striae in the dust tails of Comets Mrkos 1957 V and West 1976 VI is checked to see whether it corresponds to the predictions of the high-speed ejection theory or to a special two-step kinematical sequence. It is found that only the two-step kinematics can explain all striae in both comets. The parent clouds (first step) are found to have low lateral velocity dispersion and unusual high acceleration; magnetic confinement and plasma interaction may be the cause. The first-step clouds, comprising comoving particles, may originate in regions where dust is optically thick (tau = 1). Shadowing effects then cause a radial confinement of the cloud.
Froehlich H.-E.
Notni Peter
Thaenert W.
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