Silicon Monoxide: Detection of Maser Emission from the Second Vibrationally Excited State
Abstract
The J = 1-0 rotational transition of the second vibrational state (v = 2) of SiO has been detected in late -type variable stars and in the center of the Orion Nebula. This transition of SiO requires 3520 K of excitation for pumping the observed maser line. The ground (v = 0) and third (v = 3) vibrational states were not detected. Subject headings: masers molecules Orion Nebula variable stars
- Publication:
-
The Astrophysical Journal
- Pub Date:
- September 1974
- DOI:
- 10.1086/181600
- Bibcode:
- 1974ApJ...192L..97B