Physics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsh34a..04r&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SH34A-04
Physics
2134 Interplanetary Magnetic Fields, 2164 Solar Wind Plasma, 2169 Sources Of The Solar Wind
Scientific paper
We use Ulysses data to examine low-freqeuncy power spectra of the components and magnitude of the solar wind magnetic and velocity fields to search for signatures of photospheric differential rotation. Previous work has shown evidence for both the rigid coronal hole rotation period and for the photospheric rotation period associated with the likely source region of the fast wind at high latitidue. Here we show that while the differential rotation is seen in"compressive" quantities such as the magnitude of the magnetic field and density, the components of the field tend not to show the same differential rotation period peaks. Comparing the results to predictions of a version of the "Fisk field" model, while not ruling out the model, raises important questions about the explanations for rigid coronal hole rotation. We will discuss various alternative scenarios.
Giacalone Joe
Goldstein Michel L.
Jokipii Randy
Roberts Daniel A.
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