SOHO CTOF Observations of Interstellar He+Pickup Ion Enhancements in Solar Wind Compression Regions
作者:
L. Saul,
E. Mo¨bius,
Y. Litvinenko,
P. Isenberg,
H. Kucharek,
M. Lee,
H. Gru¨nwaldt,
F. Ipavich,
B. Klecker,
P. Bochsler,
期刊:
AIP Conference Proceedings
(AIP Available online 1903)
卷期:
Volume 679,
issue 1
页码: 778-781
ISSN:0094-243X
年代: 1903
DOI:10.1063/1.1618708
出版商: AIP
数据来源: AIP
摘要:
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. © 2003 American Institute of Physics
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