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Small scale Alfven waves and isotropization of energetic protons

Published online by Cambridge University Press:  01 November 2006

Alexander V. Stepanov  and
Yury T. Tsap
Alexander V. Stepanov
Affiliation:
Central Astronomical Observatory at Pulkovo, Russia email: stepanov@gao.spb.ru Present address: Central Astronomical Observatory at Pulkovo, Pulkovskoye chaussee 65/1, 196140 Saint-Petersburg, Russia.
Yury T. Tsap
Affiliation:
Crimean Astrophysical Observatory, Nauchny, Crimea, Ukraine email: yur@crao.crimea.ua
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Abstract

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The problem of isotropization of energetic protons in the $H_\alpha$ emitting region during flare energy release is considered. It has been shown that absence of the linear polarization of $H_\alpha$ emission in some events can be caused by excitation of small scale Alfven waves by anisotropic protons. Consequences of the proposed model are discussed.

Keywords

Sun: flareschromospheretransition regionturbulencepolarization
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S233: Solar Activity and its Magnetic Origin , March 2006 , pp. 157 - 160
Copyright
© 2006 International Astronomical Union