Adams, J. H., Jr. and Garcia-Munoz, M. and Grigorov, N. L. and Klecker, B. and Kondratyeva, M. A. and Mason, G. M. and Mewaldt, R. A. and Tretyakova, Ch. A. and Tylka, A. J.
(1990)
Anomalous Cosmic Ray Measurements in and outside the Magnetosphere: Implications for the Charge State.
In:
Proceedings of the 21st International Cosmic Ray Conference.
Vol.6.
Department of Physics and Mathematical Physics, The University of Adelaide
, Northfield, South Australia, p. 180.
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Abstract
We report preliminary results from the Joint Study of the Charge State of the
Anomalous Component, a cooperative project of the space agencies of the US and
the USSR. The so-called "anomalous" cosmic ray component, including the elements
He, N, 0, and Ne, as well as rarer species, is believed to represent a sample of neutral
interstellar atoms that has been swept into the heliosphere, singly ionized, and
then accelerated to energies as high as 60 MeV /nucleon. A key test of this theory is
a direct verification that these energetic nuclei are indeed singly ionized. This prediction
can be tested by comparing simultaneous measurements of the flux of
anomalous cosmic rays made inside and outside the magnetosphere, using the
geomagnetic field as a rigidity-dependent filter. Grigorov et al. have recently
reported measurements of the flux of 10 MeV /nucleon C, N, and 0 nuclei made during
1986 to 1988 by a series of KOSMOS satellites flown in low Earth orbit. We
have analyzed data from the same time periods from several instruments on IMP-8
and ICE, which were located outside the magnetosphere. We compare the 0 fluxes
inside and outside the magnetosphere over this time period and examine the implications
of these measurements for the charge state of anomalous cosmic rays.
Item Type: | Book Section |
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Additional Information: | © Organizing Committee of the 21st Int. Cosmic Ray Conference. Provided by the NASA Astrophysics Data System.
This work was supported in part by NASA contracts NAG8-678, NAG5-728,
NAG5-706, and W-16,480; NASA grants NGR 05-002-160, and NGR 21-002-224;
NSF grant ATM 87-20608; and BMFT-FRG contract RV 14-BB/74. |
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Group: | Space Radiation Laboratory |
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Funders: | Funding Agency | Grant Number |
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NASA | NAG8-678 | NASA | NAG5-728 | NASA | NAG5-706 | NASA | W-16,480 | NASA | NGR 05-002-160 | NASA | NGR 21-002-224 | NSF | ATM 87-20608 | Bundesministerium für Forschung und Technologie (BMFT) | RV 14-BB/74 |
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Other Numbering System: | Other Numbering System Name | Other Numbering System ID |
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Space Radiation Laboratory | 1989-17 |
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Record Number: | CaltechAUTHORS:20140708-163614888 |
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Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140708-163614888 |
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Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
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ID Code: | 47088 |
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Collection: | CaltechAUTHORS |
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Deposited By: |
Deborah Miles
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Deposited On: | 21 Jul 2014 21:06 |
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Last Modified: | 22 Nov 2019 09:58 |
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