AbstractWe have developed a multifluid chemical model of cometary comae which is an improvement to a recent work by Canaves et al. [Canaves, M.V., de Almeida, A.A., Boice, D.C., Sanzovo, G.C., Nitrogen sulfide in comets Hyakutake (C/1996 B2) and Hale-Bopp (C/1995 O1), Earth Moon Planets, 90, 1–13, 2002.] with the purpose to predict the abundances of carbon monosulfide (CS) and nitrogen sulfide (NS). The model is applied to the recent bright comets Hyakutake and Hale-Bopp at a heliocentric distance of 1AU using a detailed photo and chemical reaction network including more than 100 species and over 1000 reactions. The collisional reactions have up-to-date rate coefficients from Le Teuff et al. [Le Teuff, Y.H., Millar, T.J., Markwick, A.J., The UMIST database for astrochemistry 1999, A&AS, 146, 157–168, 2000.], while the photolytic rate coefficients were taken for minimum and maximum solar fluxes in order to estimate an lower and a upper limit for the abundances of NS and CS. The comparison of results for NS molecule in comet Hale-Bopp is in good agreement with Irvine et al. [Irvine, W.M., Senay, M., Lovell, A.J., Matthews, H.E., McGonagle, D., Meier, R., Note: detection of nitrogen sulfide in comet Hale-Bopp, Icarus, 143, 412–414, 2000.], while for CS species we show that the abundances do not seem to vary much with the cometocentric distance.
On the chemistry of CS and NS in cometary comae
Advances in Space Research ; 39 , 3 ; 451-457
2006-11-11
7 pages
Article (Journal)
Electronic Resource
English
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