The 2.5-12 micron spectrum of Comet Halley from the IKS-VEGA Experiment

Details The 2.5-12 micron spectrum of Comet Halley from the IKS-VEGA Experiment The 2.5-12 micron spectrum of Comet Halley from the IKS-VEGA Experiment

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...76..404c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 76, Dec. 1988, p. 404-436. Research supported by CNES.

Astronomy and Astrophysics

Astronomy

121

Halley'S Comet, Infrared Astronomy, Infrared Spectra, Vega Project, Carbon Dioxide, Hydrocarbons, Vibrational Spectra, Water

Scientific paper

The 'IKS' IR instrument aboard the VEGA space probes used to study Comet Halley detects the emission bands of parent molecules, and ascertains the size and temperature of the thermally-emitting nuclear region, by means of three channels with cooled detectors. Attention is presently given to the results obtained with the two (2.5-5 micron and 6-12 micron) spectroscopic channels. Strong, narrow signals are noted at 2.7 and 4.25 microns; these are attributable to the respective nu(3) vibrational bands of H2O and CO2. A broader signal in the 3.2-3.5 micron region may be due to CH-bearing molecules.

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