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The Sun in Time: From PMS to Main Sequence

Published online by Cambridge University Press:  17 November 2003

J. Arnaud ,
N. Meunier  and
M. Güdel
M. Güdel*
Affiliation:
Paul Scherrer Institut, Wuerenlingen and Villigen, 5232 Villigen PSI, Switzerland
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Abstract

The Sun's magnetic activity has changed considerably during its evolution from a protostar to a low-activity main-sequence star. The youngSun produced orders of magnitude more hot plasma, X-ray emission, and high-energyparticles. The present paper summarizes a few recent investigations onthe nature of the magnetic activity and associated high-energy processesin the Sun at different stages of its evolution,with emphasis on the physical mechanisms that may be responsible for coronal heating,the large-scale structure of the magnetic fields, and the possible mass-loss history ofthe Sun.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 9: Magnetism and Activity of the Sun and Stars , 2003 , pp. 339
Copyright
© EAS, EDP Sciences, 2003

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