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Variations of Strahl Properties with Fast and Slow Solar WindThe interplanetary solar wind electron velocity distribution function generally shows three different populations. Two of the components, the core and halo, have been the most intensively analyzed and modeled populations using different theoretical models. The third component, the strahl, is usually seen at higher energies, is confined in pitch-angle, is highly field-aligned and skew. This population has been more difficult to identify and to model in the solar wind. In this work we make use of the high angular, energy and time resolution and three-dimensional data of the Cluster/PEACE electron spectrometer to identify and analyze this component in the ambient solar wind during high and slow speed solar wind. The moment density and fluid velocity have been computed by a semi-numerical integration method. The variations of solar wind density and drift velocity with the general build solar wind speed could provide some insight into the source, origin, and evolution of the strahl.
Document ID
20090006630
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Figueroa-Vinas, Adolfo
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Goldstein, Melvyn L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Gurgiolo, Chris
(Bitteroot Basic Research, Inc. Hamilton, MT, United States)
Date Acquired
August 24, 2013
Publication Date
December 15, 2008
Subject Category
Geophysics
Meeting Information
Meeting: American Geophysical Union Meeting
Location: San Francisco, CA
Country: United States
Start Date: December 15, 2008
End Date: December 20, 2008
Distribution Limits
Public
Copyright
Other

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