Wide spectrum H2O sources - Astrophysical Raman masers

Details Wide spectrum H2O sources - Astrophysical Raman masers Wide spectrum H2O sources - Astrophysical Raman masers

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975prama...5...49r&link_type=abstract

Pramana, vol. 5, Aug. 1975, p. 49-58.

Other

18

Interstellar Masers, Raman Spectra, Water Vapor, Doppler Effect, Electron Transitions, H Ii Regions, Maser Outputs, Millimeter Waves, Molecular Spectra

Scientific paper

The extraordinarily wide 22 GHz emission from W49A and two other galactic H II regions is discussed, and arguments presented why the entire width of these spectra cannot be attributed to the 616 to 523 transition of H2O. It is suggested that most of the weak emission with large frequency shifts is due to stimulated Raman scattering of the strong central features appearing at the expected frequency of the water vapor line. It has not been possible to identify the scattering agent, but it is predicted that the spectra of millimeter-wave maser sources should also show such frequency-shifted features.

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