Shell structure in stellar water masers

Details Shell structure in stellar water masers Shell structure in stellar water masers

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...214l.135d&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 214, June 15, 1977, p. L135, L136.

Astronomy and Astrophysics

Astrophysics

25

Hydroxyl Emission, Interstellar Masers, Stellar Envelopes, Stellar Structure, Variable Stars, Water Masers, Astrophysics, Microwave Spectra, Stellar Models, Stellar Radiation, Stellar Spectra

Scientific paper

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.

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