Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..36..353s&link_type=abstract
Astrophysics and Space Science, vol. 36, Sept. 1975, p. 353-361.
Astronomy and Astrophysics
Astrophysics
22
Chemical Composition, Comet Nuclei, Ionic Reactions, Ionospheric Composition, Photodissociation, Photoionization, Absorption Cross Sections, Acetonitrile, Coma, Cyanides, Electron Density (Concentration), Hydrocyanic Acid, Ionospheres, Methyl Compounds, Reaction Kinetics, Recombination Reactions, Water
Scientific paper
Dirty ice of a second kind (major components, H2O, CO, and N2; minor components, less than several percent; NH3, CH4, and other organic substances such as HCN and CH3CN) is assumed for the composition of volatiles in a cometary nucleus. Consistency with observations of molecular ions and daughter molecules in a cometary atmosphere is argued by taking into account various ion-molecular reactions and dissociative recombinations. There is satisfactory agreement for the second kind of dirty-ice model, but the presence of large amounts of CH4 and NH3 is found to be in contradiction with observational evidence. A velocity of 8 km/s for the hydrogen atoms, derived from analysis of the hydrogen Lyman-alpha corona around comets, is found from the dissociative recombination of H3O(+), the dominant constituent of a cometary ionosphere, in accordance with the reaction H3O(+) + e(-) yields OH + H + H.
No associations
LandOfFree
Ion chemistry in the cometary atmosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Ion chemistry in the cometary atmosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ion chemistry in the cometary atmosphere will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-909173