Clusters and packets of grains in Comet Halley and the fragmentation of dust

Details Clusters and packets of grains in Comet Halley and the fragmentation of dust Clusters and packets of grains in Comet Halley and the fragmentation of dust

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989em%26p...46..221b&link_type=abstract

Earth, Moon, and Planets (ISSN 0167-9295), vol. 46, Sept. 1989, p. 221-226.

Physics

5

Cometary Atmospheres, Halley'S Comet, Interplanetary Dust, Coma, Comet Nuclei

Scientific paper

The cause of clusters and packets of dust grains, detected by the Vega spacecrafts in the coma of Comet Halley, is interpreted either as microjets arising directly from the nucleus or fragmentation processes of larger conglomerates. After summaries of the characteristics of the observed particle swarms and their interpretation as microjets, some aspects from the fragmentation scenario of this phenomenon are outlined. From the spatial widths and the total number of grains in a particle swarm the mass of the parent conglomerate can be estimated. For the clusters and packets parent bodies of about 1 to several hundred g can be expected. Finally, possible fragmentation processes are discussed and some comments for further investigations, both in theory and for in situ data, are given.

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