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Effect of coulomb losses on the spectra of heavy particles accelerated in prolonged solar events

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Abstract

This paper examines the possibility of using the energy spectra of accelerated solar cosmic-ray ions and features formed by Coulomb losses to study the solar plasma (the power-law index S for the scattering turbulence, particle number density N, and temperature T of the background medium). For an individual solar flare, Coulomb losses can be manifest to different degrees in the spectra of different ions, providing a means to determine S. A comparison of theoretical spectra for H, He, C, O, and Fe ions with observed spectra for the prolonged solar flare of October 20, 1995 yields S≈3, N≈5×109 cm−3, and T≈106 K, assuming that the characteristic time scale over which these particles gain energy is about a second.

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Authors and Affiliations

  1. St. Petersburg State Technical University, ul. Politekhnicheskaya 29, St. Petersburg, 195251, Russia

    M. F. Stovpyuk & V. M. Ostryakov

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  1. M. F. Stovpyuk
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  2. V. M. Ostryakov
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__________

Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 77, No. 12, 2000, pp. 944–952.

Original Russian Text Copyright © 2000 by Stovpyuk, Ostryakov.

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Stovpyuk, M.F., Ostryakov, V.M. Effect of coulomb losses on the spectra of heavy particles accelerated in prolonged solar events. Astron. Rep. 44, 833–840 (2000). https://doi.org/10.1134/1.1327642

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