Physics
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.9910h&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Dec. 1, 1983, p. 9910-9918. Research supported by the Max C. Fleischm
Physics
182
Current Sheets, Heliosphere, Solar Magnetic Field, Sunspot Cycle, Annual Variations, Interplanetary Magnetic Fields, Magnetic Field Configurations, Photosphere, Solar Activity
Scientific paper
Continuing the study near solar minimum in 1976-1977 (Hoeksema et al., 1982), the configuration of the heliospheric magnetic field for the period 1976-1982 is calculated using a potential field model. Particular attention is given to the structure during the rising phase, maximum, and early decline of sunspot cycle 21, from 1978 to 1982. Four warps in the current sheet (the boundary between interplanetary magnetic field toward and away from the sun) are seen early in this interval; these give rise to a four-sector structure in the interplanetary magnetic field observed at earth. It is noted that the location of the current sheet changes slowly and extends to a heliographic latitude of approximately 50 deg. The strength of the polar field correction throughout this period is determined and included in the model calculations. The lower latitude magnetic fields become much stronger as the polar fields weaken and reverse polarity near maximum, decreasing the effect of the polar field correction.
Hoeksema Jon Todd
Scherrer Philip H.
Wilcox John M.
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