Nitrogen sulfide in quiescent dark clouds

Details Nitrogen sulfide in quiescent dark clouds Nitrogen sulfide in quiescent dark clouds

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...422..621m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 422, no. 2, p. 621-625

Astronomy and Astrophysics

Astronomy

11

Abundance, Interstellar Matter, Molecular Clouds, Nitrogen, Radio Astronomy, Sulfides, Ammonia, Extremely High Frequencies, Millimeter Waves, Molecular Gases

Scientific paper

We report the first detection of interstellar nitrogen sulfide (NS) in cold dark clouds. Several components of the (2)Pi1/2, J = 3/2 to 1/2 and J = 5/2 to 3/2 transitions were observed in TMC-1 and L134N. The inferred column density for TMC-1 is NNS approximately 8 x 1012/sq cm toward the NH3 peak in that cloud, and in L134N is NNS approximately 3 x 1012/sq cm toward the position of peak NH3 emission. These values correspond to fractional abundances relative to molecular hydrogen of fNS approximately 8 x 10-10 for TMC-1, and fNS approximately 6 x 10-10 for L134N. The NS emission is extended along the TMC-1 ridge and is also extended in L134N. The measured abundances are significantly higher than those predicted by some recent gas phase ion-molecule models.

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