Structure of the heliospheric current sheet in the early portion of sunspot cycle 21

Details Structure of the heliospheric current sheet in the early portion of sunspot cycle 21 Structure of the heliospheric current sheet in the early portion of sunspot cycle 21

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....8710331h&link_type=abstract

Journal of Geophysical Research, vol. 87, Dec. 1, 1982, p. 10331-10338. Research supported by the Max C. Fleischmann Foundation

Statistics

Computation

152

Current Sheets, Interplanetary Magnetic Fields, Potential Fields, Solar Magnetic Field, Solar Rotation, Sunspot Cycle, Heliosphere, Polar Regions, Polarity

Scientific paper

The structure of the heliospheric current sheet on a spherical source surface of radius 2.35 solar radii has been computed via the use of a potential field model during the first year and a half after the last sunspot minimum. The solar polar magnetic field that is not fully observed in conventional magnetograph scans was included in the computation. The computed heliospheric current sheet had a quasi-stationary structure consisting of two northward and two southward maxima in latitude per solar rotation. The extent in latitude slowly increased from about 15 deg near the start of the interval to about 45 deg near the end. The magnetic field polarity (away from the sun or toward the sun) at the subterrestrial latitude on the source surface agreed with the interplanetary magnetic field polarity observed or inferred at the earth on 82 percent of the days. The interplanetary field structure observed at the earth at this time is finely tuned to the structure of low-latitude fields on the source surface.

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