Representative abundances of a few positive ions in the innermost coma of Comet Halley

Details Representative abundances of a few positive ions in the innermost coma of Comet Halley Representative abundances of a few positive ions in the innermost coma of Comet Halley

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993em%26p...60...59s&link_type=abstract

Earth, Moon, and Planets (ISSN 0167-9295), vol. 60, no. 1, p. 59-68.

Computer Science

2

Abundance, Comet Nuclei, Halley'S Comet, Positive Ions, Ammonia, Charge Transfer, Cyano Compounds, Hydronium Ions, Ionic Collisions, Methyl Alcohol, Water

Scientific paper

The number densities of positive ions at various cometocentric distances within 600 km from the nucleus are presently computed on the bases of (1) the production rate of H2O molecules at a heliocentric distance of 1 AU for Comet Halley, and (2) the abundance ratio (relative to water) of parent molecules at the cometary nucleus. Attention is given to the role of proton transfer reactions in the production of major ionic species; it is found that the NH4(+) ion producible via proton transfer reactions is the most abundant ion near the nucleus of a comet, unless the abundance of NH3 as a parent is abnormally low.

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