Physics
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....8710339b&link_type=abstract
Journal of Geophysical Research, vol. 87, Dec. 1, 1982, p. 10339-10346.
Physics
36
Current Sheets, Heliosphere, Interplanetary Magnetic Fields, Polarized Light, Quadrupoles, Solar Magnetic Field, Explorer 18 Satellite, Light Curve, Photosphere, Solar Cycles
Scientific paper
Latitudinal variations in the position of the heliospheric current sheet were investigated using interplanetary measurements from Helios A, Helios B, IMP 8, and white light corona measurements in the period May 1976 to May 1977. The latitude of the heliospheric current sheet between 0.3 AU and I AU is consistent with that of the maximum brightness curve of white light polarization brightness at 1.75 solar radii within approximately + or - 7 deg. The combined data sets show that the four-sector magnetic sector pattern observed in the ecliptic plane for most of this epoch could be attributed to a warped current sheet whose shape near the sun resembles a saddle surface that is nearly symmetrical about the equatorial plane. The latitudinal extent of the current sheet is on the average 8 deg and the maximum extent is 15 deg (except on one rotation, when it is 20 deg). These results can be interpreted as a consequence of the solar magnetic field, the dominant components of the field being due to a dipole nearly aligned with the sun's spin axis and a quadrupole component whose strength is about 17 percent of the dipole.
Bruno Roberto
Burlaga Leonard Francis
Hundhausen Arthur J.
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