INVESTIGADORES
LOPEZ FUENTES Marcelo Claudio
artículos
Título:
Inferring the writhe of magnetic flux tubes from the evolution of active solar regions
Autor/es:
M. C. LÓPEZ FUENTES; C. H. MANDRINI; P. DÉMOULIN; L. VAN DRIEL-GESZTELYI
Revista:
GEOFÃSICA INTERNACIONAL
Editorial:
INST GEOPHYSICS UNAM
Referencias:
Año: 2004 vol. 43 p. 83 - 88
ISSN:
0016-7169
Resumen:
We study the long-term evolution of bipolar active regions in which the main polarities are observed to rotate one about theother along several solar rotations. We propose that this peculiar evolution is due to the emergence of distorted magnetic fluxtubes. We are able to infer the sign of the writhe helicity of the flux tubes from the rotation of the axis joining the main positive andnegative polarities. The origin of the deformations may be explained by the development of a kink instability. Another possibilityis the interaction with plasma motions during the ascent of the flux tubes in the Convective Zone. We discuss the role of theCoriolis force, convective turbulence and other large-scale motions in this process.
