Mathematics – Logic
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsh52a0451m&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SH52A-0451
Mathematics
Logic
2164 Solar Wind Plasma, 2169 Sources Of The Solar Wind, 7511 Coronal Holes, 7536 Solar Activity Cycle (2162), 7549 Ultraviolet Emissions
Scientific paper
The Ultraviolet Coronagraph Spectrometer (UVCS) aboard SOHO has been collecting spectroscopic data from numerous coronal holes as part of an ongoing campaign to determine the plasma properties of the solar wind acceleration region throughout the current solar cycle. The UVCS observations show marked variations of ion properties (in the acceleration region of the high-speed solar wind) in different types of coronal holes. We present empirical models for the physical properties of large coronal holes and the acceleration of the associated high-speed solar wind derived from ultraviolet coronagraphic spectroscopy. We discuss the role of solar cycle trends and the variation of ambient coronal-hole properties (e.g., magnetic field, geometry, density). We use these observations to test phenomenological models of coronal heating and solar wind acceleration. This work is supported by NASA under Grant NAG5-11420 to the Smithsonian Astrophysical Observatory, by the Italian Space Agency and by PRODEX (Swiss contribution).
Cranmer Steven R.
Kohl John L.
Miralles Mari Paz
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