Detection of parent molecules in Comet Halley from the IKS-Vega experiment

Details Detection of parent molecules in Comet Halley from the IKS-Vega experiment Detection of parent molecules in Comet Halley from the IKS-Vega experiment

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250a.353c&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 1: Plasma and Gas p 353-358 (SEE N87

Other

11

Chemical Composition, Halley'S Comet, Infrared Spectroscopy, Molecular Spectroscopy, Vega Project, Carbon Dioxide, Spectral Emission, Spectral Signatures, Water

Scientific paper

Several parent molecules have been detected in comet Halley using the 2.5 - 5 microns channel of the IKS experiment aboard Vega 1. The spectral resolving power was about 40 at 2.5 microns and 70 at 5 microns. The υ3 band of H2O has been observed at 2.7 microns, with an intensity corresponding to a production rate of about 1030s-1. The υ3 band of CO2 has been detected for the first time at 4.3 microns; the derived CO2/H2O ratio is 1.5×10-2. In addition, there are emission features between 3.3 microns and 3.7 microns, also observed for the first time in a comet, which could be attributed to CH-bearing molecules. Other weaker spectral signatures are also tentatively identified.

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