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Wolf — Rayet Stars, Cosmic Rays and Gamma Rays

  • Michel Cassé
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 109)

Abstract

Similarities and differences between the heavy element composition of galactic cosmic ray sources and solar energetic particles, together with cosmic ray isotopic anomalies are discussed in the framework of current theories of the origin and acceleration of the cosmic radiation. It is shown that carbon rich Wolf-Rayet stars could play the role of auxiliary sources of cosmic rays, accelerating to relativistic energies the products of their nucleosynthesis (12C, 16O, 22Ne, 25Mg, 26Mg, 36S, 58Fe, s-process elements up to mass 90)

The recent discovery of gamma-ray sources held out the possibility of identifying at least some of the CR sources. It has been suggested that a class of gamma-ray sources is possibly linked with regions of star formation. Stellar winds from WR stars dominate the energetics of OB associations over a period of a few million yr, after which supernovae take over. The connection between gamma-ray sources and OB associations is the most vividely illustrated by the Carina Nebula, for which a self-consistent model of Y ray emission is presented.

Keywords

Solar Energetic Particle Stellar Wind First Ionization Potential Rayet Star Solar Energetic Particle Abundance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© D. Reidel Publishing Company 1984

Authors and Affiliations

  • Michel Cassé
    • 1
  1. 1.Service d’AstrophysiqueCEN SaclayFrance

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