He+ Interstellar Pickup Ion Anisotropies and Flux Variations Associated with Solar Wind Structures as Observed by SOHO CELIAS CTOF

Details He+ Interstellar Pickup Ion Anisotropies and Flux Variations Associated with Solar Wind Structures as Observed by SOHO CELIAS CTOF He+ Interstellar Pickup Ion Anisotropies and Flux Variations Associated with Solar Wind Structures as Observed by SOHO CELIAS CTOF

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsh31b..04s&link_type=abstract

American Geophysical Union, Spring Meeting 2002, abstract #SH31B-04

Physics

Plasma Physics

7800 Space Plasma Physics

Scientific paper

Despite a rapidly growing understanding of the interaction of the Heliosphere with the local interstellar medium (LISM), large unexplained fluctuations in both the pickup ion flux and their velocity distribution remain at a variety of time scales. Large variations are commonplace for the solar wind physicist, however the source population for the pickup ions (the LISM) is expected to be far more uniform. By comparing the He+ distribution measured in situ by SOHO CELIAS CTOF with other solar wind parameters, some of these fluctuations can be explained as transport phenomenon. We present results from the brief lifetime of the instrument, in which the pickup ion fluxes are seen to be enhanced in compression regions, including corotating interaction regions and coronal mass ejections. In addition, statistical correlations with the interplanetary magnetic field and other solar wind parameters have been observed, and will be presented as clues towards a further understanding of the pickup ion flux variations.

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