Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-26T04:24:12.363Z Has data issue: false hasContentIssue false
  • English
  • Français

Chirality, Helicity, and Joy’s Law

Published online by Cambridge University Press:  12 April 2016

P. Foukal
P. Foukal*
Affiliation:
CRI, Inc., Boston, MA 02134, USA E-mail: [email protected]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Connections between the morphology of filaments and the global topology of the sun’s magnetic field, are an important topic that seems ready for assembly into a coherent picture. We suggest that the chirality of mid-and high-latitude filaments described by Martin et al. is most easily understood if they form in evolved “Type 1” neutral lines within active region bipoles, rather than in the “Type 2” neutral lines formed at the boundaries between bipoles, where lower-latitude filaments tend to form. This interpretation removes the disagreement between filament chirality and the well-known tilt of bipolar active regions described by Joy’s law, which exists if the high-latitude filaments formed at Type 2 neutral lines. Dynamical explanation of these two observed regularities probably implies quantitative understanding of the processes that govern the sign and magnitude of the α and ѡ-effects in a solar dynamo.

Type
Global Patterns
Information
International Astronomical Union Colloquium , Volume 167: New Perspectives on Solar Prominences , 1998 , pp. 446 - 452
Copyright
Copyright © Astronomical Society of the Pacific 1998

References

Anzer, U. and Heinzel, P. 1998, Solar Phys., 179, 75 Google Scholar
Babcock, H. 1961, ApJ, 133, 572 Google Scholar
d’Silva, S. 1992, in The Solar Cycle, Harvey, K. (ed.), ASP Conf. Ser. 27, San Francisco, p. 168 Google Scholar
Foukal, P. 1971, Solar Phys., 19, 59 Google Scholar
Hale, G., Ellerman, F., Nicholson, S., and Joy, A. 1919 ApJ, 49, 153 Google Scholar
Leighton, R. 1964, ApJ, 140, 1547 CrossRefGoogle Scholar
LeRoy, J. 1978, A&A, 64, 247 Google Scholar
LeRoy, J., Bommier, V., and Sahal-Brechot, S. 1983, Solar Phys., 83, 135 CrossRefGoogle Scholar
Martin, S., Bilimoria, R., and Tracada, P. 1994, in Solar Surface Magnetism Rutten, R., and Schrijver, C. (eds.), Kluwer Acad. Publ., Dordrecht, Holland, p. 303 Google Scholar
Parker, E. 1955, ApJ, 122, 293 Google Scholar
Rust, D. 1997, in Coronal Mass Ejections, Crooker, N., Joselyn, J. and Feynman, J. (eds.), AGU Geophys. Mono., Vol. 99, Washington, DC, p. 119 Google Scholar
Rust, D. 1967, ApJ,. 150, 313 CrossRefGoogle Scholar
Sheeley, N. 1992 in The Solar Cycle, Harvey, K. (ed.), ASP Conf. Ser. 27, San Francisco, p. 1 Google Scholar