Physics
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..125..399g&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 125, Feb. 1990, p. 399-407.
Physics
1
Current Sheets, Heliosphere, Interplanetary Magnetic Fields, Solar Magnetic Field, Asymmetry, Latitude, Solar Cycles
Scientific paper
The nature and evolution of north-south asymmetry in the heliospheric current sheet (HCS) is investigated using solar and interplanetary magnetic field observations. The mean heliographic latitude of the HCS is found to be nonzero during many solar rotations, indicating that the large-scale solar magnetic field is more ordered in a system where the origin is shifted away from the center of the sun. It is shown that the asymmetry in the HCS is manifested in different forms depending on the transition heliographic latitude of the reversal of dominant polarity of the IMF and the difference in the maximum latitudinal extension of the HCS in the two solar hemispheres. The observations suggest that the solar cycle period is associated to a greater degree than periodicities with the evolution of asymmetry in the HCS. It is found that asymmetry in sunspot activity about the solar equator does not seem to be consistently related to the asymmetry in the HCS about the heliographic equator.
Girish T. E.
Prabhakaran Nayar S. R.
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