Physics – Plasma Physics
Scientific paper
Sep 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.3465h&link_type=abstract
Geophysical Research Letters, Volume 25, Issue 18, p. 3465-3468
Physics
Plasma Physics
42
Interplanetary Physics: Ejecta, Driver Gases, And Magnetic Clouds, Interplanetary Physics: Sources Of The Solar Wind, Space Plasma Physics: Charged Particle Motion And Acceleration
Scientific paper
On its trajectory to Jupiter and over the poles of the Sun the Ulysses spacecraft has observed a considerable number of Coronal Mass Ejection (CME) transients in slow and in fast solar wind streams. The analysis of the magnetic field topology and the O7+/O6+ charge state ratio of 56 of these events has yielded strong evidence for a systematic connection between the two features. Coronal mass ejections with magnetic cloud structure have an increased O7+/O6+ ratio with respect to the ambient solar wind whereas non-cloud CMEs do not show enhanced O7+/O6+ ratios. We discuss possible mechanisms based on the freezing-in concept that can account for the observation.
Balogh André
Forsyth Robert J.
Gloeckler George
Henke T.
Livi Stefano S.
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