LiBeB Energetics and Cosmic Ray Origin

Details LiBeB Energetics and Cosmic Ray Origin LiBeB Energetics and Cosmic Ray Origin

1998-12-02

arxiv.org/abs/astro-ph/9812060v1

Astrophys.Space Sci. 265 (1999) 71-76

Astronomy and Astrophysics

Astrophysics

latex 6 pages, 2 eps figures (included), uses crckapb.sty (included) To appear in the Proceedings of the Meudon Symposium, Gal

Scientific paper

10.1023/A:1002185328791

Three different models have been proposed for LiBeB production by cosmic rays: the CRI model in which the cosmic rays are accelerated out of an ISM of solar composition scaled with metallicity; the CRS model in which cosmic rays with composition similar to that of the current epoch cosmic rays are accelerated out of fresh supernova ejecta; and the LECR model in which a distinct low energy component coexists with the postulated cosmic rays of the CRI model. These models are usually distinguished by their predictions concerning the evolution of the Be and B abundances. Here we emphasize the energetics which favor the CRS model. This model is also favored by observations showing that the bulk (80 to 90%) of all supernovae occur in hot, low density superbubbles, where supernova shocks can accelerate the cosmic rays from supernova ejecta enriched matter.

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