Hydrogenation of Interstellar Molecules: A Survey for Methylenimine (CH 2NH)

Details Hydrogenation of Interstellar Molecules: A Survey for Methylenimine (CH 2NH) Hydrogenation of Interstellar Molecules: A Survey for Methylenimine (CH 2NH)

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...479..307d&link_type=abstract

Astrophysical Journal v.479, p.307

Astronomy and Astrophysics

Astronomy

23

Ism: Abundances, Ism: Molecules

Scientific paper

Methylenimine (CH2NH) has been convincingly detected for the first time outside the Galactic center as part of a study of the hydrogenation of interstellar molecules. We have observed transitions from energy levels up to about 100 K above the ground state in the giant molecular clouds W51, Orion KL and G34.3+0.15. In addition, CH2NH was found at the "radical-ion peak" on the quiescent ridge of material in the Orion molecular cloud. The abundance ratio CH2NH/HCN at the radical-ion peak agrees with the predictions of recent gas-phase chemical models. This ratio is an order of magnitude higher in the warmer cloud cores, suggesting additional production pathways for CH2NH, probably on interstellar grains.

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