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Mechanisms for Radio Continuum Emission of Long-Period Variable Stars

Published online by Cambridge University Press:  07 August 2017

G. M. Rudnitskij
G. M. Rudnitskij*
Affiliation:
Sternberg Astronomical Institute Moscow State University Moscow V-234, 119899 Russia

Extract

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The radio continuum emission of long-period variables (LPVs) in the continuum is considered. For some LPVs (e.g., R Aql and V Hya) weak emission, observed at centimeter wavelengths, can be explained by thermal free-free radiation of the ionized gas behind the shock front in the stellar atmosphere. The ionized layer behind the shock remains optically thick at the wavelengths as short as 1 cm; the brightness temperature found for R Aql at 2 cm by Drake et al. (1987, AJ, 94, 1280), Tb = 18000 K, is consistent with the expected temperature behind the shock.

Type
IV. Planetary Nebulae Connection: Evolution from the AGB
Information
Symposium - International Astronomical Union , Volume 155: Planetary Nebulae , 1993 , pp. 323
Copyright
Copyright © Kluwer 1993