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The Mean Charge State of Anomalous Cosmic Ray Oxygen

Adams, J. H., Jr. and Garcia-Munoz, M. and Grigorov, N. L. and Klecker, B. and Kondratyeva, M. A. and Mason, G. M. and McGuire, R. E. and Mewaldt, R. A. and Panasyuk, M. I. and Tretyakova, Ch. A. and Tylka, A. J. and Zhuravlev, D. A. (1991) The Mean Charge State of Anomalous Cosmic Ray Oxygen. In: Proceedings of the 22nd International Cosmic Ray Conference. Vol.3. Institute for Advanced Study , Dublin, Ireland, pp. 358-361.

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The ionic charge state of anomalous cosmic ray oxygen has been determined by comparing measurements obtained inside the magnetosphere on a series of Cosmos satellite flights with simultaneous observations outside the magnetosphere from IMP-8 and ICE. We find a mean charge state <Q>=0.9(+0.3/-0.2) for ~10 MeV/nuc anomalous oxygen, consistent with the model of Fisk, Kozlovsky, and Ramaty in which anomalous cosmic rays originate from the neutral component of the local interstellar medium (ISM). This same approach gives <Q>=+7 for solar energetic oxygen ions.

Item Type:Book Section
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URLURL TypeDescription
Mason, G. M.0000-0003-2169-9618
Mewaldt, R. A.0000-0003-2178-9111
Additional Information:Dublin Institute for Advanced Studies. Provided by the NASA Astrophysics Data System. We thank NASA and IKI for sponsoring this study. We thank D. I. Kozlov for the Cosmos flights. This work is supported in part by NASA contracts NAG8-678, NAGS-706, W-17 ,358; NASA grants NAGS-728, NOR 05-002-160, NAGW-1990; NSF grant ATM90-20608; and BMFT-FRG contract RV 14-B8;74.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Bundesministerium für Forschung und Technologie (BMFT)RV 14-BB/74
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1991-15
Record Number:CaltechAUTHORS:20140924-143327852
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50006
Deposited By: Deborah Miles
Deposited On:30 Sep 2014 18:44
Last Modified:22 Nov 2019 09:58

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