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Results of the Ulysses fast latitude scan: Magnetic field observations
Author(s) -
Smith E. J.,
Balogh A.,
Burton M. E.,
Erdös G.,
Forsyth R. J.
Publication year - 1995
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/95gl03088
Subject(s) - coronal hole , helmet streamer , heliospheric current sheet , latitude , longitude , physics , current sheet , equator , solar wind , heliosphere , polar , corona (planetary geology) , solar rotation , astronomy , coronal mass ejection , geophysics , magnetic field , solar physics , magnetohydrodynamics , astrobiology , quantum mechanics , venus
The rapid crossing of the solar equatorial region by Ulysses as it returned from the south pole resulted in 7 crossings of the heliospheric current sheet between 10°S and 20°N and 10 distinct solar wind interaction regions between 18°S and 22°N. Both the extent of the current sheet and the latitude interval containing the interaction regions are a factor of ≈ 2 less than were observed by Ulysses when it left the equatorial region in 1993. A map of the current sheet in heliographic latitude and Carrington longitude reveals two folds corresponding to 4 magnetic sectors. The coronal holes associated with the sectors, the interaction regions and high‐speed streams have been identified. Two sectors were associated with a pair of asymmetrically‐placed polar coronal holes whereas the other two sectors coincided with a pair of near‐equatorial coronal holes on opposite sides of the equator.