Initial Time Dependence of Abundances in Solar Energetic Particle Events

Details Initial Time Dependence of Abundances in Solar Energetic Particle Events Initial Time Dependence of Abundances in Solar Energetic Particle Events

Mar 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...531l..83r&link_type=abstract

The Astrophysical Journal, Volume 531, Issue 1, pp. L83-L86.

Astronomy and Astrophysics

Astronomy

21

Acceleration Of Particles, Shock Waves, Sun: Corona, Sun: Particle Emission

Scientific paper

We compare the initial behavior of Fe/O and He/H abundance ratios and their relationship to the evolution of the proton energy spectra in ``small'' and ``large'' gradual solar energetic particle (SEP) events. The results are qualitatively consistent with the behavior predicted by the theory of Ng et al. published in 1999. He/H ratios that initially rise with time are a signature of scattering by non-Kolmogorov Alfvén wave spectra generated by intense beams of shock-accelerated protons streaming outward in large gradual SEP events.

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