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OH/IR Stars: Dark Planetary Nebulae?

Published online by Cambridge University Press:  18 September 2017

J. Herman
J. Herman*
Affiliation:
Sterrewacht, Huygens Laboratorium, Leiden

Extract

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The OH maser emission from OH/IR stars (type IIb) originates from the thick circumstellar dust shell. As the envelope is expanding and the strongest maser emission comes from the front- and the backside, where the gain pathlength is longest, we can measure a definite phaselag (and hence a diameter) between front- and backside of the shell for all sources that are variable.

Type
Abstracts of Contributed Papers
Information
Symposium - International Astronomical Union , Volume 103: Planetary Nebulae , 1983 , pp. 529 - 530
Copyright
Copyright © Reidel 1983