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Elemental Composition at the Cosmic-Ray Source Derived from the ACE-CRIS Instrument. I. _6C to _(28)Ni

Israel, M. H. and Lave, K. A. and Wiedenbeck, M. E. and Binns, W. R. and Christian, E. R. and Cummings, A. C. and Davis, A. J. and de Nolfo, G. A. and Leske, R. A. and Mewaldt, R. A. and Stone, E. C. and von Rosenvinge, T. T. (2018) Elemental Composition at the Cosmic-Ray Source Derived from the ACE-CRIS Instrument. I. _6C to _(28)Ni. Astrophysical Journal, 865 (1). Art. No. 69. ISSN 1538-4357. doi:10.3847/1538-4357/aad867.

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We report new elemental source abundances from _6C to _(28)Ni for galactic cosmic rays, using observations from the Cosmic Ray Isotope Spectrometer (CRIS) on board the NASA Advanced Composition Explorer spacecraft. Abundances were calculated using CRIS energy spectra at energies below 550 MeV/nucleon from the 1997–98 and 2009–10 solar-minimum periods, as well as from the 2001–03 solar-maximum period. These new results, when combined with results for heavier elements reported in a forthcoming paper, are consistent with a model of galactic cosmic-ray origin where nuclei found in interstellar grains are accelerated preferentially over those found in interstellar gas, with this acceleration happening in OB associations.

Item Type:Article
Related URLs:
URLURL TypeDescription
Israel, M. H.0000-0002-8104-208X
Wiedenbeck, M. E.0000-0002-2825-3128
Binns, W. R.0000-0001-6110-3407
Christian, E. R.0000-0003-2134-3937
Cummings, A. C.0000-0002-3840-7696
de Nolfo, G. A.0000-0002-3677-074X
Leske, R. A.0000-0002-0156-2414
Mewaldt, R. A.0000-0003-2178-9111
Stone, E. C.0000-0002-2010-5462
Alternate Title:Elemental Composition at the Cosmic-Ray Source Derived from the ACE-CRIS Instrument. I. 6C to 28Ni
Additional Information:© 2018 The American Astronomical Society. Received 2018 January 29; revised 2018 July 16; accepted 2018 August 3; published 2018 September 21. NASA grants NNX08AI11G and NNX13AH66G supported the work performed at the California Institute of Technology, the Jet Propulsion Laboratory, and Washington University in St. Louis. The work done at Goddard Space Flight Center was funded by NASA through the ACE Project. We thank Nasser Barghouty for his private communication of updated partial interaction cross sections of protons on heavy nuclei, and we thank Christina Cohen for her editorial assistance in preparing this manuscript.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Subject Keywords:astroparticle physics – cosmic rays – ISM: abundances
Issue or Number:1
Record Number:CaltechAUTHORS:20180921-095050945
Persistent URL:
Official Citation:M. H. Israel et al 2018 ApJ 865 69
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89824
Deposited By: Tony Diaz
Deposited On:21 Sep 2018 17:35
Last Modified:16 Nov 2021 00:38

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