Published in

Kluwer, Symposium- International Astronomical Union, (140), p. 21-25, 1990

DOI: 10.1017/s0074180900189429

Galactic and Intergalactic Magnetic Fields, p. 21-25

DOI: 10.1007/978-94-009-0569-6_6

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Masers and Stellar Magnetic Fields

Journal article published in 1990 by Mark J. Reid ORCID
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

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.