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On a Cyclic Variation of the Hemispheric Helicity RuleWe report the result of a study magnetic helicity in solar active regions during 1980-2000.Using the vector magnetograms four different instruments we calculated the force-free parameter alpha as in Pevtsov et al.(1995). We use alpha as the proxy for current helicity density.
Document ID
20030066141
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Pevtsov, A. A. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Hagyard, M. J. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Blehm, Z. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Smith, J. E. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Canfield, R. C. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Sakurai, T. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Solar Physics
Meeting Information
Meeting: International Astronomical Union Conference
Location: Sydney
Country: Australia
Start Date: July 16, 2003
Sponsors: International Astronomy Union
Distribution Limits
Public
Copyright
Other

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