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Explaining the Hemispheric Pattern of Filament Chirality

  • Duncan H. Mackay (a1) and Anthony R. Yeates (a2)
Abstract

Solar filaments are known to exhibit a hemispheric pattern in their chirality, where dextral/sinistral filaments dominate in the northern/southern hemisphere. We show that this pattern may be explained through data driven 3D global magnetic field simulations of the Sun's large-scale magnetic field. Through a detailed comparison with 109 filaments over a 6 month period, the model correctly reproduces the filament chirality and helicity with a 96% agreement. The data driven simulation is extended to run over a full solar cycle, where predictions are made for the spatial and temporal dependence of the hemispheric pattern over the solar cycle.

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Copyright
References
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Mackay, D. H. & van Ballegooijen, A. A. 2006, ApJ, 641, 577
Martin, S. F., Bilimoria, R., & Tracadas, P. W. 1994, Solar Surface Magnetism, 303
van Ballegooijen, A. A., Priest, E. R., & Mackay, D. H. 2000, ApJ, 539, 983
Yang, W. H., Sturrock, P. A., & Antiochos, S. K. 1986, ApJ, 309, 383
Yeates, A. R., Mackay, D. H., & van Ballegooijen, A. A. 2007, Solar Phys., 245, 87
Yeates, A. R., Mackay, D. H., & van Ballegooijen, A. A. 2008, Solar Phys., 247, 103
Yeates, A. R. & Mackay, D. H. 2009, Solar Phys., 254, 77
Yeates, A. R. & Mackay, D. H. 2012, ApJL, 753, L34
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Proceedings of the International Astronomical Union
  • ISSN: 1743-9213
  • EISSN: 1743-9221
  • URL: /core/journals/proceedings-of-the-international-astronomical-union
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