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Detailed Reference Information |
Hofer, M.Y., Marsden, R.G., Sanderson, T.R. and Tranquille, C. (2002). Composition measurements above the Southern Solar Polar Region around the solar activity maximum by the Ulysses COSPIN/LET instrument. Geophysical Research Letters 29: doi: 10.1029/2002GL014944. issn: 0094-8276. |
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In November 2000, during the second southern polar passage (SPP), the Ulysses spacecraft reached its highest heliographic latitude (80.2¿) at a solar radial distance of ~2.27 AU. The first SPP in 1994 took place as the level of solar activity was approaching the minimum between the cycles 22 and 23. The recent high-latitude observations during the second SPP in 2000/2001 correspond to near-maximum activity conditions with a large number of transient phenomena. These heliospheric conditions are reflected in the energetic particle composition data covering the energy range 4--20 MeV/n recorded by the COSPIN/-LET instrument. Most of the particles observed at high heliographic latitudes had their origin in solar energetic particle events. Furthermore, the results suggest coronal mass ejection-driven shock acceleration of coronal material as the source. |
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Abstract |
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Keywords
Solar Physics, Astrophysics, and Astronomy, Energetic particles, Solar Physics, Astrophysics, and Astronomy, Corona, Space Plasma Physics, Shock waves |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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