U93.174: a New Interstellar Line with Quadrupole Hyperfine Splitting
Abstract
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 1974
- DOI:
- 10.1086/181638
- Bibcode:
- 1974ApJ...193L..83T
- Keywords:
-
- Hyperfine Structure;
- Interstellar Radiation;
- Microwave Spectra;
- Molecular Spectra;
- Quadrupoles;
- Ammonia;
- Formaldehyde;
- Line Spectra;
- Nitrogen;
- Nuclear Spin;
- Radio Astronomy;
- Astrophysics