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Impact Polarization and Charge Exchange as Diagnostics of Proton Beams in Solar Flares

  • C. Balança
  • N. Feautrier
Part of the Astrophysics and Space Science Library book series (ASSL, volume 243)

Abstract

The aim of this paper is to show how accurate cross sections allow to calculate the impact polarization of the Hα line in the case of excitation of chromospheric hydrogen atoms by proton beams accelerated during solar flares. The charge exchange and the direct excitation processes are strongly coupled. The double charge exchange is a new process which, when taken into account, leads to a 25% more polarization after the global balance.

Key words

polarization charge exchange close coupling scattering stars: sun flares methods: numerical 

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Copyright information

© Springer Science+Business Media Dordrecht 1999

Authors and Affiliations

  • C. Balança
    • 1
  • N. Feautrier
    • 1
  1. 1.DAMAP and URA 812 CNRSObservatoire de ParisMeudon CedexFrance

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