HCO+ in the coma of comet Hale-Bopp
Journal or Book Title
EARTH MOON AND PLANETS
Maps of comet C/1995 O1 (Hale-Bopp) in the millimeter-wave emission of the ion HCO+ revealed a local minimum near the nucleus position, with a maximum about 100,000 km in the antisolar direction. These observed features of the HCO+ emission require a low abundance of HCO+ due to enhanced destruction in the inner coma of the comet, within a region of low electron temperature (Te). To set constraints on the formation of HCO+ in the coma, as well as the location and magnitude of the transition to higher Te, the data are compared with the results of ion-molecule chemistry models.
Lovell, AJ; Schloerb, FP; Bergin, EA; Dickens, JE; Devries, CH; Senay, MC; and Irvine, William M., "HCO+ in the coma of comet Hale-Bopp" (1999). EARTH MOON AND PLANETS. 476.