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The 2.5 to 5 microns spectrum of comet Halley from the IKS instrument of Vega |
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| Authors: | M Combes V I Moroz J F Crifo J P Bibring N Coron J Crovisier T Encrenaz N F Sanko A Grigoriev D Bockele-Morvan R Gispert C Emerich J M Lamarre F Rocard V A Krasnopolsky T Owen |
| Institution: | * Observatoire de Paris, 92190 Meudon, Paris, France ** Space Research Institute, Profsoyuznaya 84/32, 117810, Moscow GSP-7, USSR *** Laboratoire de Physique Stellaire et Planétaire CNRS, 91370, Verrières-le-Buisson, France † Laboratoire René Bernas, 91406, Orsay, France ‡ ESS Department — S.U.N.Y., Stony Brook, NY 11794, USA |
| Abstract: | Results of the 2.5–5 micron spectroscopic channel of the IKS instrument on Vega are reported and the data reduction process is described. H2O and CO2 molecules have been detected with production rates of 1030 s−1 and 1.5 1028 s−1 respectively. Emission features between 3.3 and 3.7 microns are tentatively attributed to CH - bearing compounds - CO is marginally detected with a mixing ratio CO/H2O  0.2. OH emission and H2O - ice absorption might also be present in the spectra. |
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