The dark nucleus of Comet Halley: Hydrogen cyanide polymers

Details The dark nucleus of Comet Halley: Hydrogen cyanide polymers The dark nucleus of Comet Halley: Hydrogen cyanide polymers

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250b.273m&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 2: Dust and Nucleus p 273-276 (SEE N

Biology

5

Comet Nuclei, Halley'S Comet, Hydrocyanic Acid, Polymerization, Ammonia, Crusts, Exobiology, Ice, Interstellar Chemistry, Methane

Scientific paper

The authors propose that the dark crust of comet Halley consists largely of hydrogen cyanide polymers. The expected predominance on cometary nuclei of frozen volatiles such as methane, ammonia and water makes them ideal sites for the formation and condensed-phase polymerization of HCN. Dust emanating from Halley's nucleus, contributing to the coma and tail, would also arise partly from the polymer. Indeed, secondary species such as CN have been widely detected, as well as HCN itself. The significance of these results is considered in relation to the origin of life on Earth and to extraterrestrial chemistry in general.

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