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

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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Autores principales: Poisson, Mariano, Mandrini, Cristina Hemilse
Publicado: 2011
Materias:
Sun: magnetic fields
Sun: photosphere
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17439213_v7_nS286_p246_Poisson
http://hdl.handle.net/20.500.12110/paper_17439213_v7_nS286_p246_Poisson
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_17439213_v7_nS286_p246_Poisson
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spelling paper:paper_17439213_v7_nS286_p246_Poisson2023-06-08T16:28:06Z Evolution of a very complex active region during the decay phase of Cycle 23 Poisson, Mariano Mandrini, Cristina Hemilse Sun: magnetic fields Sun: photosphere 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. Fil:Poisson, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mandrini, C.H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17439213_v7_nS286_p246_Poisson http://hdl.handle.net/20.500.12110/paper_17439213_v7_nS286_p246_Poisson
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Sun: magnetic fields
Sun: photosphere
spellingShingle Sun: magnetic fields
Sun: photosphere
Poisson, Mariano
Mandrini, Cristina Hemilse
Evolution of a very complex active region during the decay phase of Cycle 23
topic_facet Sun: magnetic fields
Sun: photosphere
description 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.
author Poisson, Mariano
Mandrini, Cristina Hemilse
author_facet Poisson, Mariano
Mandrini, Cristina Hemilse
author_sort Poisson, Mariano
title Evolution of a very complex active region during the decay phase of Cycle 23
title_short Evolution of a very complex active region during the decay phase of Cycle 23
title_full Evolution of a very complex active region during the decay phase of Cycle 23
title_fullStr Evolution of a very complex active region during the decay phase of Cycle 23
title_full_unstemmed Evolution of a very complex active region during the decay phase of Cycle 23
title_sort evolution of a very complex active region during the decay phase of cycle 23
publishDate 2011
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17439213_v7_nS286_p246_Poisson
http://hdl.handle.net/20.500.12110/paper_17439213_v7_nS286_p246_Poisson
work_keys_str_mv AT poissonmariano evolutionofaverycomplexactiveregionduringthedecayphaseofcycle23
AT mandrinicristinahemilse evolutionofaverycomplexactiveregionduringthedecayphaseofcycle23
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