The origin of primary cosmic rays: Constraints from ACE elemental and isotopic composition observations

M. E. Wiedenbeck, Nathan Eugene Yanasak, A. C. Cummings, A. J. Davis, J. S. George, R. A. Leske, R. A. Mewaldt, E. C. Stone, P. L. Hink, M. H. Israel, M. Lijowski, E. R. Christian, T. T. Von Rosenvinge

Research output: Contribution to journalArticle

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Abstract

Cosmic-ray isotope observations from NASA's Advanced Composition Explorer (ACE) mission have been used to investigate the composition of cosmic-ray source material. Source abundances relative to 56Fe are reported for eleven isotopes of Ca, Fe, Co, and Ni, including the very rare isotopes 48Ca and 64Ni. Although the source abundances range over a factor ∼ 104, most of the ratios to 56Fe are consistent with solar-system values to within ∼ 20%. However, there are some notable differences, the most significant being an excess of ∼ (70 ± 30)% relative to the solar system for the cosmic-ray source ratio 58Fe/56Fe. The possible association of such an excess with a contribution to the cosmic-ray source from Wolf-Rayet star ejecta is discussed.

Original languageEnglish (US)
Pages (from-to)15-26
Number of pages12
JournalSpace Science Reviews
Volume99
Issue number1-4
DOIs
StatePublished - Dec 1 2001

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Advanced Composition Explorer
primary cosmic rays
cosmic ray
isotopic composition
cosmic rays
isotope
isotopes
solar system
ejecta
Wolf-Rayet stars
relative abundance

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Wiedenbeck, M. E., Yanasak, N. E., Cummings, A. C., Davis, A. J., George, J. S., Leske, R. A., ... Von Rosenvinge, T. T. (2001). The origin of primary cosmic rays: Constraints from ACE elemental and isotopic composition observations. Space Science Reviews, 99(1-4), 15-26. https://doi.org/10.1023/A:1013816209004

The origin of primary cosmic rays : Constraints from ACE elemental and isotopic composition observations. / Wiedenbeck, M. E.; Yanasak, Nathan Eugene; Cummings, A. C.; Davis, A. J.; George, J. S.; Leske, R. A.; Mewaldt, R. A.; Stone, E. C.; Hink, P. L.; Israel, M. H.; Lijowski, M.; Christian, E. R.; Von Rosenvinge, T. T.

In: Space Science Reviews, Vol. 99, No. 1-4, 01.12.2001, p. 15-26.

Research output: Contribution to journalArticle

Wiedenbeck, ME, Yanasak, NE, Cummings, AC, Davis, AJ, George, JS, Leske, RA, Mewaldt, RA, Stone, EC, Hink, PL, Israel, MH, Lijowski, M, Christian, ER & Von Rosenvinge, TT 2001, 'The origin of primary cosmic rays: Constraints from ACE elemental and isotopic composition observations', Space Science Reviews, vol. 99, no. 1-4, pp. 15-26. https://doi.org/10.1023/A:1013816209004
Wiedenbeck, M. E. ; Yanasak, Nathan Eugene ; Cummings, A. C. ; Davis, A. J. ; George, J. S. ; Leske, R. A. ; Mewaldt, R. A. ; Stone, E. C. ; Hink, P. L. ; Israel, M. H. ; Lijowski, M. ; Christian, E. R. ; Von Rosenvinge, T. T. / The origin of primary cosmic rays : Constraints from ACE elemental and isotopic composition observations. In: Space Science Reviews. 2001 ; Vol. 99, No. 1-4. pp. 15-26.
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