On the nature of maser sources in infrared stars

Details On the nature of maser sources in infrared stars On the nature of maser sources in infrared stars

May 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....40..233b&link_type=abstract

Astronomy and Astrophysics, vol. 40, no. 3, May 1975, p. 233-236. Translation.

Astronomy and Astrophysics

Astrophysics

5

Hydroxyl Emission, Infrared Stars, Masers, Microwave Spectra, Stellar Radiation, Astronomical Models, Pumping, Shock Fronts, Stellar Spectra, Thermal Instability, Water Vapor

Scientific paper

It is shown that behind the shock front in the shell of an infrared star, thermal instability conditions are fulfilled, which results in fragmentation of the medium. In the clouds thus formed, conditions for ignition of OH and H2O masers may be fulfilled. The 1612-MHz spatial structure of OH sources in NML Cyg and VY CMa is discussed, as well as the problems of the pumping mechanisms of OH and H2O masers. The peculiarities of microwave spectra are briefly considered.

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