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Masers and Stellar Magnetic Fields

Published online by Cambridge University Press:  19 July 2016

Mark J. Reid
Mark J. Reid*
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden Street Cambridge, Massachusetts 02188

Abstract

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Observations of circular polarization of molecular masers associated with late type giant and supergiant stars can be used to estimate the magnetic field strength in the masing region. Magnetic field strengths of ~ 5 mG are deduced for OH masers in circumstellar envelopes at distances of ~ 1016 cm from the star, and magnetic field strengths of ~ 50 G are deduced for SiO masers that reside above the photosphere. Extrapolation to the stellar photosphere suggests that average surface magnetic fields are on the order of 103 G.

Type
1. A Survey of Magnetic Phenomena near the Solar Photosphere, in the Corona, and in Stellar Winds
Information
Symposium - International Astronomical Union , Volume 140: Galactic and Intergalactic Magnetic Fields , 1990 , pp. 21 - 25
Copyright
Copyright © Kluwer 1990 

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