Physics
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999kosis..37..143b&link_type=abstract
Kosmicheskie Issledovaniia, Tom 37, No. 2, p. 143 - 150
Physics
Solar Wind: Helium, Solar Wind: Space Research, Solar Wind: Interplanetary Magnetic Field
Scientific paper
Data of the Prognoz-7 and Prognoz-8 satellites are analyzed with respect to the relative helium abundance, nα/np, of the low-velocity solar wind at the Earth's orbit region. On the basis of the whole data set, the conclusion is drawn that nα/np experiences a considerable decrease when a satellite traverses a region where the interplanetary magnetic field changes sign. This line corresponds to the neutral line of the global magnetic field (the projection of the symmetry plane of the low-latitude streamer) in the solar corona (in particular, at the so called source surface located at a distance of 2.5 solar radii from the center). A possible interrelation between nα/np peaks and their sources at the Sun, which are located near the places of sign change of intermediate-scale magnetic fields, is noticed.
Badalyan Olga G.
Ermolaev Yu. I.
Livshits Moisey A.
Val'Chuk T. E.
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