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Stellar Winds and Spindown in Red Giants

Published online by Cambridge University Press:  04 August 2017

A. S. Endal
A. S. Endal*
Affiliation:
Applied Research Corporation 8201 Corporate Drive, Landover, MD 20785 USA

Abstract

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Recent observations of rotation rates in G and K giants show a sudden drop in the rotation rate at spectral type G5. The observed behavior requires a strong external brake, such as applied by a magnetized stellar wind. Since spectral type G5 coincides with the onset of deep envelope convection in giants, a dynamo mechanism is suggested as the controlling factor. Stellar evolution models have been used to estimate the time scale for the rotational braking, the angular momentum loss rate, and the required magnetic field strengths.

Type
V. Stellar Winds and Spindown in Late — Type Stars
Information
Symposium - International Astronomical Union , Volume 102: Solar and Stellar Magnetic Fields: Origins and Coronal Effects , 1983 , pp. 493 - 498
Copyright
Copyright © Reidel 1983 

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