Charge States of Solar Cosmic Rays and Constraints on Acceleration Times and Coronal Transport

Details Charge States of Solar Cosmic Rays and Constraints on Acceleration Times and Coronal Transport Charge States of Solar Cosmic Rays and Constraints on Acceleration Times and Coronal Transport

1997-02-19

arxiv.org/abs/astro-ph/9702160v1

Astrophys.J. 481 (1997) L119-L121

Astronomy and Astrophysics

Astrophysics

7 pages LaTeX + 2 tables in separate LaTeX file, necessary AAS macros are included, accepted by Astrophys. J. Lett

Scientific paper

10.1086/310663

We examine effects on the charge states of energetic ions associated with gradual solar flares due to shock heating and stripping at high ion velocities. Recent measurements of the mean charges of various elements after the flares of 1992 Oct 30 and 1992 Nov 2 allow one to place limits on the product of the electron density times the acceleration or coronal residence time. In particular, any residence in coronal loops must be for < 0.03 s, which rules out models of coronal transport in loops, such as the bird cage model. The results do not contradict models of shock acceleration of energetic ions from coronal plasma at various solar longitudes.

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