Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29v..23m&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 22, pp. 23-1, CiteID 2066, DOI 10.1029/2002GL015164
Astronomy and Astrophysics
Astrophysics
10
Interplanetary Physics: Corotating Streams, Interplanetary Physics: Interplanetary Magnetic Fields, Solar Physics, Astrophysics, And Astronomy: Coronal Holes
Scientific paper
Observations of the magnetic field orientation in co-rotating rarefaction regions (CRRs) reveals that the field can be significantly more radial than predicted by the Parker model. In particular, CRRs sampled by the Ulysses spacecraft beyond 4 AU from the sun often show average field orientations deviating by more than 30° from the expected Archimedian spiral and lasting many days. These observations are explained by a model combining footpoint motion between fast and slow solar wind streams at the source surface with the effects of velocity shear across coronal hole boundaries.
Murphy Neil
Schwadron Nathan A.
Smith Edward. J.
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