Cometary cores with multiple structure from the Oort cloud and the general scheme of origin of unusually active comets

Details Cometary cores with multiple structure from the Oort cloud and the general scheme of origin of unusually active comets Cometary cores with multiple structure from the Oort cloud and the general scheme of origin of unusually active comets

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985kosis..23..766d&link_type=abstract

(Kosmicheskie Issledovaniia, vol. 23, Sept.-Oct. 1985, p. 766-782) Cosmic Research (ISSN 0010-9525), vol. 23, no. 5, March 1986,

Astronomy and Astrophysics

Astrophysics

Astrophysics, Comet Nuclei, Oort Cloud, Astronomical Models, Comets, Gravitational Effects, Tides

Scientific paper

To treat several key problems concerning multiple-core comets (power mechanism, place and epoch of formation of the multiple-core structure, qualitative differences between current structure and younger structure, the origin of two types of cometary orbits) and a new scheme is constructed. The concept consists of the following elements: evolution of a system of satellites of the core toward a collisionless structure; preservation of internal kinetic energy in the collisionless system over astronomically lengthy time scales; and tidal initiation of a collisional mechanism with the first revolution of the ancient multiple core in the zone of visibility. The proposed scheme for the origin and evolution of the structure of the cometary core gives the simplest key to understanding the partition mechanism of comets and shows the possibility of their solar-tidal partition at more significant distances from the sun than have been previously suggested.

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