CN jets as progenitors of CN shells in the coma of Comet P/Halley

Details CN jets as progenitors of CN shells in the coma of Comet P/Halley CN jets as progenitors of CN shells in the coma of Comet P/Halley

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990esasp.315..121s&link_type=abstract

In ESA, Formation of Stars and Planets, and the Evolution of the Solar System p 121-125 (SEE N91-18922 10-90)

Astronomy and Astrophysics

Astronomy

2

Cn Emission, Comet Heads, Comet Nuclei, Cometary Atmospheres, Halley'S Comet, Radio Jets (Astronomy), Chemical Analysis, Cosmochemistry, Shell Stars

Scientific paper

Strong evidence for a connection between CN (cyanide) jets and CN shells in the coma of comet P/Halley is found on digitized CN photographs. At radii of about 80,000 km the transition between jets and shells can be localized by image processing methods. One shell originates from two opposite jets which merge together around the nucleus. This is dynamically impossible for CN jets being directly ejected from a spatially confined source of CN on the nucleus. In such a case, particles would have a preferential direction away from the nucleus and there are no processes by which this direction could be changed. The transition between jets and shells indicates that the CN is produced by secondary sources. There is further evidence that these sources are CHON particles.

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