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The Origin of Primary Cosmic Rays: Constraints from ACE Elemental and Isotopic Composition Observations

Wiedenbeck, M. E. and Yanasak, N. E. and Cummings, A. C. and Davis, A. J. and George, J. S. and Leske, R. A. and Mewaldt, R. A. and Stone, E. C. and Hink, P. L. and Israel, M. H. and Lijowski, M. and Christian, E. R. and 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). pp. 15-26. ISSN 0038-6308. https://resolver.caltech.edu/CaltechAUTHORS:20140827-090214937

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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 ^(56)Fe are reported for eleven isotopes of Ca, Fe, Co, and Ni, including the very rare isotopes ^(48)Ca and ^(64)Ni. Although the source abundances range over a factor ∼10^4, most of the ratios to ^(56)Fe 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 ^(58)Fe/^(56)Fe. The possible association of such an excess with a contribution to the cosmic-ray source from Wolf–Rayet star ejecta is discussed.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1023/A:1013816209004DOIArticle
https://rdcu.be/bPUPePublisherFree ReadCube access
ORCID:
AuthorORCID
Wiedenbeck, M. E.0000-0002-2825-3128
Cummings, A. C.0000-0002-3840-7696
Mewaldt, R. A.0000-0003-2178-9111
Stone, E. C.0000-0002-2010-5462
Israel, M. H.0000-0002-8104-208X
Christian, E. R.0000-0003-2134-3937
Additional Information:© 2001 Kluwer Academic Publishers. Received 29 September 2000; Accepted in final form: 15 January 2001. We are grateful to the large group of dedicated individuals that participated in the development of the CRIS instrument (listed in Stone et al., 1998). We also thank J. Klarmann for contributions to the CRIS data analysis. This research was supported by the National Aeronautics and Space Administration at the California Institute of Technology (under grant NAG5-6912), the Jet Propulsion Laboratory, the Goddard Space Flight Center, and Washington University.
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
NASANAG5-6912
JPLUNSPECIFIED
Goddard Space Flight CenterUNSPECIFIED
Washington UniversityUNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory2001-12
Issue or Number:1-4
Record Number:CaltechAUTHORS:20140827-090214937
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140827-090214937
Official Citation: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. doi: 10.1023/a:1013816209004
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48966
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:27 Aug 2014 17:58
Last Modified:03 Oct 2019 07:09

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