Solar wind carbon, nitrogen and oxygen abundances measured in the earth's magnetosheath with AMPTE/CCE

Details Solar wind carbon, nitrogen and oxygen abundances measured in the earth's magnetosheath with AMPTE/CCE Solar wind carbon, nitrogen and oxygen abundances measured in the earth's magnetosheath with AMPTE/CCE

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13..793g&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 13, Aug. 1986, p. 793-796. BMFT-supported research.

Astronomy and Astrophysics

Astronomy

34

Abundance, Ampte (Satellites), Magnetosheath, Magnetospheric Ion Density, Positive Ions, Solar Wind, Spaceborne Astronomy, Carbon, Energetic Particles, Nitrogen, Oxygen, Particle Mass, Spectrometers

Scientific paper

The solar wind number density ratios of C(6+) + C(5+) and N(7+) + N(6+) + N(5+) relative to O(8+) + O(7+) + O(6+) have been measured for the first time using data from the Charge-Energy-Mass Spectrometer on the AMPTE/CCE spacecraft during four solar active periods from Sept. 19 to Nov. 1, 1984 when CCE traversed the subsolar magnetosheath of the compressed magnetosphere. It is found that the average values of the density ratios of C/O and N/O to be 0.43 + or - 0.03 and 0.15 + or - 0.06, respectively. These ratios, as well as the average He(2+)/O ratio of 43 + or - 5 for these same time periods, are in excellent agreement with Solar Energetic Particles (SEP) abundance ratios as well as SEP-derived coronal abundances of these elements. The solar wind C/O ratio is substantially below the generally accepted photospheric value of 0.60.

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