Title

DETECTION OF NITRIC-OXIDE IN THE DARK CLOUD L134N

Publication Date

1990

Journal or Book Title

ASTROPHYSICAL JOURNAL

Abstract

The first detection of interstellar nitric oxide (NO) in a cold dark cloud, L134N is reported. Nitric oxide was observed by means of its two 2 Pi 1/2, J = 3/2 - 1/2, rotational transitions at 150.2 and 150.5 GHz, which occur because of Lambda-doubling. The inferred column density for L134N is about 5 x 10 to the 14th/sq cm toward the SO peak in that cloud. This value corresponds to a fractional abundance relative to molecular hydrogen of about 6 x 10 to the -8th and is in good agreement with predictions of quiescent cloud ion-molecule chemistry. NO was not detected toward the dark cloud TMC-1 at an upper limit of 3 x 10 to the -8th or less.

Comments

The published version is located at http://adsabs.harvard.edu/full/1990ApJ...359..121M

Volume

359

Pages

121-124

Issue

1

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