Cosmic Rays Radiative Pre-acceleration in Wolf-Rayet Stellar Winds

Popescu, A. S. (2005) Cosmic Rays Radiative Pre-acceleration in Wolf-Rayet Stellar Winds. In: British-Romanian-Hungarian N+N+N Workshop for Young Researchers On Plasma- and Astrophysics: from laboratory to outer space Edited by I. Ballai, E. Forgács-Dajka, A. Marcu and K. Petrovay. Publications of the Astronomy Department of the Eötvös University (15). ELTE Sokszorosítóüzeme, Budapest, pp. 169-180.

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Abstract

In the article "Cosmic Rays VIII" of Popescu we gave an model for the observed cosmic rays between 5×10^15 and 3×10^18 eV. Their surse is presumed to be supernova of stars that explode in their winds. The observed cosmic abundance at the source are affected by spallation in the supernova shell, by the difference in ionization degree (being one two times ionized) at the injection in the supernova shock, the stars with initial masses 15 M_{\odot}\leq M\leq 30 M_{\odot}$ having a different contribution to them than the stars with 30 M_{\odot}\leq M\leq 50 M_{\odot} and this is 2:1 for the elements with Z\geq 6. Still, the abundances after these corrections are different by a factor Z_{i}/Z_{He} where Z_{i} is the atomic number for the element i and Z_{He} the one for He. This paper is dedicated to the explanation of this factor and its physical meanings.

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