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- W1624712815 abstract "Our knowledge of the volatile composition of comets has advanced considerably since the last IAU Astrochemistry Symposium, in large part due to the apparition of comet Hale-Bopp and its study with both new ground-based instruments and from spacecraft. Some 23 or 24 coma molecules are now known which are probably, at least in part, volatile constituents of the nucleus. Relative abundances have been measured for rarer isotopomers of molecules containing 13 C, 15 N, 34 S, and D, and significant isotopic fractionation is observed for D-containing species. There are striking similarities in both relative abundances of molecular constituents and in isotopic fractionation between material in dense interstellar clouds and that in cometary comae. Whether this indicates that cometary nuclei consist of relatively unprocessed interstellar matter is less clear, since the observed coma composition is not simply related to the nuclear composition, and since recent chemical models of the outer solar nebula mimic interstellar chemistry in important respects." @default.
- W1624712815 created "2016-06-24" @default.
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- W1624712815 date "2000-01-01" @default.
- W1624712815 modified "2023-09-26" @default.
- W1624712815 title "Molecules in Comets: An ISM-Solar System Connection?" @default.
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- W1624712815 doi "https://doi.org/10.1017/s0074180900165015" @default.
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