Regularities of variation of the heliospheric current sheet orientation during the solar activity cycle

Details Regularities of variation of the heliospheric current sheet orientation during the solar activity cycle Regularities of variation of the heliospheric current sheet orientation during the solar activity cycle

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992soph..140..369g&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 140, no. 2, Aug. 1992, p. 369-378.

Physics

11

Current Sheets, Heliosphere, Solar Activity, Solar Cycles, Sunspots, Interplanetary Magnetic Fields, Solar Corona, Solar Magnetic Field

Scientific paper

The evolution of spatial orientation of the heliospheric current sheet (HCS) has been studied in detail using synoptic maps of the HCS configuration over the period 1971-1989. Analysis involves all phases of the sunspot cycle except for two years of maximum solar activity. The helmet-like coronal streamers are confirmed to be structural elements of the HCS. The rms deviation of a real HCS configuration from a plane does not exceed about 10 deg during most of the sunspot cycle length. Regularities of variation of the two following parameters of the HCs orientation have been revealed: obliquity to the solar equator plane ('heel' or tilt) and longitudinal orientation ('yawing'). Behavior of the above parameters is repeated in different cycles. However, heeling and yawing occur probably not synchronous but rather independent of one another.

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