Evidence for molecular cloud material in meteorites and interplanetary dust

Details Evidence for molecular cloud material in meteorites and interplanetary dust Evidence for molecular cloud material in meteorites and interplanetary dust

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..402..545m&link_type=abstract

Astrophysical implications of the laboratory study of presolar materials. AIP Conference Proceedings, Volume 402, pp. 545-564 (

Physics

27

Interstellar Medium And Nebulae In Milky Way, Interplanetary Physics

Scientific paper

Some primitive meteorites and interplanetary dust particles (IDPs) exhibit large excesses in deuterium (D) and/or 15N relative to terrestrial values. These anomalies likely represent the partial preservation of materials that experienced extreme chemical mass fractionation in the cold, dense molecular cloud predating our Solar System. The largest D/H ratios observed so far in extraterrestrial materials occur in IDPs, reaching the values of some molecules in interstellar molecular clouds. Constraints on the nature of the D- and 15N-rich carrier phases in IDPs and meteorites are reviewed.

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