Laboratory Spectroscopy of MgNC: The First Radioastronomical Identification of Mg-bearing Molecule
Abstract
The linear MgNC radical was detected, for the first time, by laboratory microwave spectroscopy, and six unidentified lines in IRC + 10216 reported by Guelin et al. (1986) were assigned to the transitions of this radical. The radical was produced in a free space absorption cell by a dc discharge in a mixture of magnesium vapor, argon, and cyanogen. Observed spectral lines in the 250-370 GHz region were analyzed by using the 2Sigma energy level expression, to give the rotational, centrifugal distortion and spin-rotation constants: B0 = 5966.8969(24) MHz, D0 = 0.004 2338(35) MHz, H0 = 0.308(16) x 10 exp -7 MHz, and gamma0 = 15.219(13) MHz, with one standard deviation in parentheses.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1993
- DOI:
- 10.1086/186781
- Bibcode:
- 1993ApJ...406L..39K
- Keywords:
-
- Astronomical Spectroscopy;
- Line Spectra;
- Magnesium Compounds;
- Molecular Spectroscopy;
- Radio Astronomy;
- Electron Transitions;
- Molecular Spectra;
- Radio Spectroscopy;
- Stellar Envelopes;
- Astronomy;
- LINE: IDENTIFICATION;
- MOLECULAR DATA;
- RADIO LINES: STARS