Publication Date:
2019-08-17
Description:
A coronal mass ejection and magnetic cloud containing an unusually large enhancement of He+ was observed in the solar wind by the plasma and magnetic field instruments on the Advanced Composition Explorer (ACE) spacecraft on May 2-4, 1998. The He+/He++ ratio during this event exceeded 0.5% for a period of more than 24 hours, and reached values as high as 100%. The high He+/He++ ratio indicates the presence of prominence material, and in fact a disappearing filament and prominence were observed at the Sun in association with this event. The prolonged observation of He+ indicates that prominence material extended through mu ch of this CME, the first such observation in a CME in the solar wind.
Keywords:
Solar Physics
Type:
Paper-1988GL900207
,
An Investigation of the Large Scale Evolution and Topology of Coronal Mass Ejections in the Solar Wind (ISSN 0094-8276); Appedix 7
Format:
text
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