Destruction and production of molecules in circumstellar regions of T Tauri stars |
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Authors: | G. F. Gahm |
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Affiliation: | 1. Stockholm Observatory, Saltsj?baden, Sweden
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Abstract: | It is shown that the lifetimes of molecules against photodissociation in circumstellar envelopes of T Tauri stars are very short. The production rates of CO through gas-phase reactions are not sufficient to keep the equilibrium column densities at an observable level. The absence of molecular features reported for this class of stars is qualitatively understood. |
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