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Cosmic-ray origin in OB associations and preferential acceleration of refractory elements: Evidence from abundances of elements 26Fe through 34Se

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arxiv 0906.2021 v1 pith:XZQW25FY submitted 2009-06-10 astro-ph.HE astro-ph.GA

Cosmic-ray origin in OB associations and preferential acceleration of refractory elements: Evidence from abundances of elements 26Fe through 34Se

B. F. Rauch , J. T. Link , K. Lodders , M. H. Israel , L. M. Barbier , W. R. Binns , E. R. Christian , J. R. Cummings
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G. A. de Nolfo S. Geier R. A. Mewaldt J. W. Mitchell S. M. Schindler L. M. Scott E. C. Stone R. E. Streitmatter C. J. Waddington M. E. Wiedenbeck
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classification astro-ph.HE astro-ph.GA
keywords elementsaccelerationcosmic-rayabundancesassociationsinterstellarsupportaccelerated
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We report abundances of elements from 26Fe to 34Se in the cosmic radiation measured during fifty days of exposure of the Trans-Iron Galactic Element Recorder (TIGER) balloon-borne instrument. These observations add support to the concept that the bulk of cosmic-ray acceleration takes place in OB associations, and they further support cosmic-ray acceleration models in which elements present in interstellar grains are accelerated preferentially compared with those found in interstellar gas.

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