Physics
Scientific paper
Sep 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988soph..116..369g&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 116, no. 2, 1988, p. 369-376.
Physics
5
Current Sheets, Heliosphere, Interplanetary Magnetic Fields, Magnetic Field Configurations, Solar Magnetic Field, Magnetic Dipoles, Quadrupoles, Solar Activity, Solar Cycles
Scientific paper
It is shown that in a heliomagnetic field the presence of a magnetic quadrupole in addition to a magnetic dipole introduces a north-south asymmetry in the heliospheric current sheet (HCS) about the heliographic equator. The dominant polarity of the interplanetary magnetic field (IMF) for the above type of current sheet reverses sign at a transition latitude theta(T), which lies in a heliohemisphere opposite to the one in which the HCS has more heliolatitudinal extension. The position of theta(T) in the heliosphere and the north-south asymmetry introduced in the HCS change with the relative phase of the dipole and quadrupole components present in the solar magnetic field. The effect of the above type of asymmetric HCS in the IMF 'mean sector width' is evaluated, and the results are in agreement with the observations during the minima of solar cycle 21.
Girish T. E.
Prabhakaran Nayar S. R.
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