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Shock waves - The trigger mechanism of SiO masers in circumstellar envelopes of cool giants and supergiants

Published online by Cambridge University Press:  04 August 2017

Astrid Heske
Astrid Heske*
Affiliation:
Hamburger Sternwarte Gojenbergsweg 112 2050 Hamburg 80, F.R.G.

Extract

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Circumstellar envelopes of cool giants and supergiants are composed of different parts which can be observed through characteristic spectral features. One is SiO-maseremission which is typically found in Miras and some semi-regular variable supergiants. These masers are thought to originate in those parts of the upper atmosphere or lower circumstellar envelope where still no mass-loss takes place. Location and trigger mechanism was still not definitely clear.

Type
Circumstellar Shells and Envelopes
Information
Symposium - International Astronomical Union , Volume 122: Circumstellar Matter , 1987 , pp. 253 - 254
Copyright
Copyright © Reidel 1987 

References

Elitzur, M. 1980, Astrophys. J. 240, 553 CrossRefGoogle Scholar
Willson, L.A. and Bowen, G.W. 1986, Third Trieste Workshop on the Relationship between Chromospheric/Coronal Heating and Mass-Loss; eds. Stalio, R. and Zirker, J., pp. 127 Google Scholar