Gas / Grain Interactions and the E/a Ratio of Methyl-Cyanide in the Taurus Molecular CLOUD-1

Details Gas / Grain Interactions and the E/a Ratio of Methyl-Cyanide in the Taurus Molecular CLOUD-1 Gas / Grain Interactions and the E/a Ratio of Methyl-Cyanide in the Taurus Molecular CLOUD-1

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.263l..40w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 263, NO. 3/AUG1, P. L40, 1993

Astronomy and Astrophysics

Astronomy

8

Molecular Processes - Dust, Extinction - Ism: Individual: Tmc-1 - Ism: Molecules

Scientific paper

We investigate the effect of gas-grain interactions in determining the E/A ratio of CH3CN and its total abundance in Th4C-1. The return of grain mantle material is required to be efficient We show that a desorption process driven by H2 formation may have an appropriate rate. The details of the E → A conversion on surfaces are unknown; if these ideas are confirmed by further study, however, then the chemistry of gas and solid phases in dark interstellar clouds such as TMC-1 must be significantly modified by desorption processes.

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