Physics
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985rpspr...6...31d&link_type=abstract
In its USSR Rept.: Space (JPRS-USP-85-005) p 31 (SEE N86-14111 04-88) Transl. into ENGLISH from Kosmich. Issled. (Moscow), v.
Physics
Comet Nuclei, Energy Sources, Evolution (Development), Comet Tails, Ice, Interplanetary Dust, Particle Collisions, Secondary Emission
Scientific paper
It is hypothesized that the intrinsic energy of a multiple cometary nucleus (MCN) plays the dominant role in the physical behavior of especially active comets. This results from the fact that the relatively low energy of the impact mechanism is capable of sustaining the extremely high level of consumption of solar energy toward the sublilmation of cometary matter from the icy-dust cloud into the nuclear region. The intrinsic activity of the MCN gradually decays in the course of its evolution into a system with a collisionless sturcture. The sudden switch-on of the shock mechanism is associated with the removal of a tail of large clumps around the main mass of the MCN; the most simple reason for this is a powerful tidal effect on the tail. The more complex process of the switch-off of the impact mechanism follows the nontidal division of the main mass of the nucleus.
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