Evolution of a very complex active region during the decay phase of Cycle 23

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We study the emergence and evolution of AR NOAA 10314, observed on the solar disk during March 13-19, 2003. This extremely complex AR is of particular interest due to its unusual magnetic flux distribution and the clear rotation of the polarities of a d-spot within the AR. Using SOHO/MDI magnetogram...

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Detalles Bibliográficos
Autores principales: Poisson, M., Fuentes, M.L., Mandrini, C.H., Démoulin, P., Pariat, E.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2011
Materias:
Sun: magnetic fields
Sun: photosphere
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_17439213_v7_nS286_p246_Poisson
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:We study the emergence and evolution of AR NOAA 10314, observed on the solar disk during March 13-19, 2003. This extremely complex AR is of particular interest due to its unusual magnetic flux distribution and the clear rotation of the polarities of a d-spot within the AR. Using SOHO/MDI magnetograms we follow the evolution of the photospheric magnetic flux to infer the morphology of the structure that originates the AR. We determine the tilt angle variation for the d-spot and find a counter-clockwise rotation corresponding to a positive writhed flux tube. We compute the magnetic helicity injection and the total accumulated helicity in the AR and find a correlation with the observed rotation. © 2012 International Astronomical Union.

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