Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsh52a0455w&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SH52A-0455
Physics
7524 Magnetic Fields, 7529 Photosphere, 7536 Solar Activity Cycle (2162), 7544 Stellar Interiors And Dynamo Theory, 7594 Instruments And Techniques
Scientific paper
The helicity flux from winding motions in isolated, quiet-sun magnetic flux elements can be expressed as a sum of mutual-helicity flux (from the braiding of field lines from distinct elements), and a self-helicity flux (from the braiding of field lines in individual elements). In a previous paper, we used a tracking algorithm applied to five sequences of high-cadence, high-resolution SoHO MDI magnetograms (each eight hours or longer) to quantify the quiet-sun mutual-helicity flux. Here, we use the same data sets and tracking routines to quantify the quiet-sun self-helicity flux, from the time evolution of the quadrupole moments of individual magnetic flux elements. No systematic injection of self-helicity from the quiet sun is obvious in our results, leading us to conclude that there is essentially no mean self-helicity flux from winding motions in quiet sun fields.
Longcope Dana Warfield
Welsch Brian Thomas
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