A search for the millimeter-wave transitions of CO(+) in Comet P/Halley

Details A search for the millimeter-wave transitions of CO(+) in Comet P/Halley A search for the millimeter-wave transitions of CO(+) in Comet P/Halley

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...67..515b&link_type=abstract

Icarus (ISSN 0019-1035), vol. 67, Sept. 1986, p. 515-519.

Computer Science

2

Atmospheric Ionization, Carbon Monoxide, Cometary Atmospheres, Halley'S Comet, Millimeter Waves, Comet Nuclei, Orbital Elements, Photodissociation

Scientific paper

The authors searched for the N = 2 to 1, J = 5/2 to 3/2, and J = 3/2 to 1/2 millimeter-wave transitions of CO+ in Comet P/Halley. No detection was made, but they obtained a 2 σ upper limit to the beam averaged column density of CO+ in the coma of 8×1011cm-2. They compare this upper limit to model predictions and conclude that: (1) H2O is likely to be the main constituent of the nucleus of Comet Halley, (2) if photodissociative ionization is active in the coma of Comet Halley, then most of the CO+ probably originates in CO2, rather than CO, and (3) the effective radius for outgassing of the nucleus of Comet Halley was less than 10 km at the time of the authors' observations.

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