Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-04-21
Astronomy and Astrophysics
Astrophysics
4 pages, 5 figures, Solar Wind 10 Conference Proceedings Paper
Scientific paper
10.1063/1.1618708
We present a recent analysis with 1996 SOHO CELIAS CTOF data, which reveals correlations of He+ pickup ion fluxes and spectra with the magnetic field strength and solar wind density. The motivation is to better understand the ubiquitous large variations in both pickup ion fluxes and their velocity distributions found in interstellar pickup ion datasets. We concentrate on time periods of that can be associated with compression regions in the solar wind. Along with enhancements of the overall pickup ion fluxes, adiabatic heating and acceleration of the pickup ions are also observed in these regions. Transport processes that lead to the observed compressions and related heating or acceleration are discussed. A shift in velocity space associated with traveling interplanetary compression regions is observed, and a simple model presented to explain this phenomenon based on the conserved magnetic adiabatic moment.
Bochsler Peter
Gruenwaldt H.
Ipavich F.
Isenberg Phil
Klecker Berndt
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