Jets physics in Comet P/Halley

Details Jets physics in Comet P/Halley Jets physics in Comet P/Halley

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988stin...8920049f&link_type=abstract

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Computer Science

Comet Nuclei, Comet Tails, Cosmic Dust, Halley'S Comet, Plasma Jets, Carbon, Grain Size, Molecular Beams, Space Debris, Water

Scientific paper

CCD images of comet P/Halley taken from Catania Observatory in April 1986 with IHW filters are analyzed. On scale distances larger than 200,000 Km these images show the presence of jets in the Cont....A, H2O(+) and C2 filters. The jet maximum intensity is at less than 1000 Km from the nucleus for dust, at 20,000 to 30,000 Km for H2O(+) and at 60,000 to 90,000 Km for C2, implying 20,000 s or 100,000 s formation time for the last two molecules. Comparison of various images shown that H2O(+) and C2 jets are in very different directions, the first one coinciding with the main dust jet, the second one appearing as a continuation in space of a very short dust jet. It is speculated that dust grains have different sizes and chemical composition from the moment they leave the cometary nucleus, and that grains in the small dust jet undergo fragmentation and chemical reactions to produce C2 jets.

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