Shell structure in stellar water masers.
Abstract
Double-peaked emission features have been observed in water spectra from six long-period variables. These spectra closely parallel the double-peaked OH emission in the same stars. These observations strongly support the circumstellar-shell model for maser emission rather than the asymmetric-shock model. The velocity separation for water is somewhat less than for OH, and it is argued that the observed water lines originate in a shell whose radial distance from the star is less than the accompanying OH emission.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 1977
- DOI:
- 10.1086/182459
- Bibcode:
- 1977ApJ...214L.135D
- Keywords:
-
- Hydroxyl Emission;
- Interstellar Masers;
- Stellar Envelopes;
- Stellar Structure;
- Variable Stars;
- Water Masers;
- Astrophysics;
- Microwave Spectra;
- Stellar Models;
- Stellar Radiation;
- Stellar Spectra;
- Astrophysics