The synthesis of hydrocarbon molecules in a shocked interstellar cloud

Astronomy and Astrophysics – Astronomy

Scientific paper

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Abundance, Hydrocarbons, Interstellar Chemistry, Molecular Clouds, Acetylene, Chemical Evolution, Gas-Ion Interactions, Reaction Kinetics, Shock Wave Propagation, Synthesis (Chemistry)

Scientific paper

A calculation has been carried out in which the abundances of 108 species are followed for 105 yr after the passage of a 10 km s-1 shock through an interstellar cloud of initial density 100 cm-3. Post-shock abundances of hydrocarbon molecules containing from one to six carbon atoms are presented. Hydrocarbon species with up to six carbon atoms are found to attain post-shock fractional abundances of greater than 10-8. Column abundances of the hydrocarbon molecules are presented and their formation mechanisms are discussed.

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