Model of OH maser in the circumstellar envelope of Mira stars.

Details Model of OH maser in the circumstellar envelope of Mira stars. Model of OH maser in the circumstellar envelope of Mira stars.

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999acaps..19...39s&link_type=abstract

Acta Astrophys. Sin., Vol. 19, No. 1, p. 39 - 48

Astronomy and Astrophysics

Astrophysics

Circumstellar Shells: Oh Masers, Circumstellar Shells: Mira Stars

Scientific paper

The authors calculate the mass and velocity distribution of the envelope of Mira stars, for an axisymmetric distribution of the envelope mass. They also calculate the inversion regions of the four 18 cm lines of OH. They assume that the radiation pressure comes from the central star and the thermal emission of the dust itself. The authors consider pumping mechanisms due to emission from the central star, collision, emission from the dust itself and cosmic microwave background. The model reproduces some of the general features seen in the real sources.

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