Title

Hydrogenation of interstellar molecules: A survey for methylenimine (CH2NH)

Publication Date

1997

Journal or Book Title

ASTROPHYSICAL JOURNAL

Abstract

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.

Comments

The published version is located at http://iopscience.iop.org/0004-637X/479/1/307

Volume

479

Pages

307-312

Issue

1

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