Maser and thermal SiO emission in evolved stars

Details Maser and thermal SiO emission in evolved stars Maser and thermal SiO emission in evolved stars

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.260..157b&link_type=abstract

In ESA Proceedings of an ESA Workshop on a Spaceborne Submillimeter Astronomy Mission. A Cornerstone of the ESA Long Term Scienc

Astronomy and Astrophysics

Astronomy

Interstellar Masers, M Stars, Silicon Oxides, Thermal Emission, Radio Astronomy, Stellar Composition, Stellar Envelopes

Scientific paper

The authors present observations of the SiO maser emission at 43 GHz and of the SiO thermal emission at 87 GHz from evolved stars. As a reference, they have also observed the 115 GHz line of CO, a good tracer of circumstellar matter. The authors conclude from their observations that both maser and thermal SiO emission in M-type stars are probably generated in an extended inner region (radius ⪉10 R*), in which the grains are still not completely formed. Physical conditions for this inner envelope are derived.

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