Li Be B Energetics and Cosmic Ray Origin |
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| Authors: | Reuven Ramaty Richard E Lingenfelter |
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| Institution: | (1) NASA/GSFC, Greenbelt, MD 29771, USA;(2) UCSD, LaJolla, CA 92093, USA |
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| Abstract: | Three different models have been proposed for LiBeB production bycosmic rays: the CRI model in which the cosmic rays areaccelerated
out of an ISM of solar composition scaled withmetallicity; the CRS model in which cosmic rays with compositionsimilar to that
of the current epoch cosmic rays are acceleratedout of fresh supernova ejecta; and the LECR model in which adistinct low energy
component coexists with the postulated cosmicrays of the CRI model. These models are usually distinguished bytheir predictions
concerning the evolution of the Be and Babundances. Here we emphasize the energetics which favor the CRSmodel. This model
is also favored by observations showing that thebulk (80 to 90%) of all supernovae occur in hot, low densitysuperbubbles,
where supernova shocks can accelerate the cosmicrays from supernova ejecta enriched matter.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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