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Nature of Large-Scale Solar Magnetic Field and Complexity of HCS as Observed in Interplanetary Plasma

Published online by Cambridge University Press:  19 July 2016

T E Girish  and
S R Prabhakaran Nayar
T E Girish
Affiliation:
Department of Physics, University of Kerala Kariavattom, Trivandrum. INDIA 695 581
S R Prabhakaran Nayar
Affiliation:
Department of Physics, University of Kerala Kariavattom, Trivandrum. INDIA 695 581

Extract

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The properties of the interplanetary plasma and magnetic field near 1 AU is determined by the nature of large-scale solar magnetic field and the associated structure of the heliospheric current sheet (HCS). Magnetic multipoles often present near the solar equator affect the solar wind plasma and magnetic field (IMF) near earth's orbit. The observation of four or more IMF sectors per solar rotation and the north-south asymmetry in the HCS are observational manifestations of the influence of solar magnetic multipoles, especially the quadrupole on the interplanetary medium (Schultz, 1973; Girish and Nayar, 1988). The solar wind plasma is known to be organised around the HCS. In this work, we have investigated the possibility of inferring i) the relative dipolar and quadrupolar heliomagnetic contributions to the HCS geometry from the observation of four sector IMF structure near earth and ii) the properties of the north-south asymmetry in HCS geometry about the heliographic equator from IMF and solar wind observations near 1 AU.

Type
VII. Magnetic Reconnection and Coronal Evolution
Information
Symposium - International Astronomical Union , Volume 142: Basic Plasma Processes on the Sun , 1990 , pp. 343 - 344
Copyright
Copyright © Kluwer 1990 

References

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