U93.174 - A new interstellar line with quadrupole hyperfine splitting

Details U93.174 - A new interstellar line with quadrupole hyperfine splitting U93.174 - A new interstellar line with quadrupole hyperfine splitting

Oct 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974apj...193l..83t&link_type=abstract

Astrophysical Journal, vol. 193, Oct. 15, 1974, pt. 2, p. L83-L87.

Astronomy and Astrophysics

Astronomy

56

Hyperfine Structure, Interstellar Radiation, Microwave Spectra, Molecular Spectra, Quadrupoles, Ammonia, Formaldehyde, Line Spectra, Nitrogen, Nuclear Spin, Radio Astronomy

Scientific paper

A new interstellar triplet of microwave lines has been discovered at 93.174 GHz. The relative intensities and frequencies of the triplet indicate a J equals 1 to zero transition of a molecule containing an atom with nuclear spin of 1, very likely nitrogen, occupying an 'outboard' position in the molecule. Based on these clues, Green et al. (1974) suggest N2H(+) as an identification. The molecule is widespread in the Galaxy but appears to have rather lower abundance than H2CO, CS, and NH3.

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