IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Study of topological properties of peculiar active regions
Autor/es:
M. C. LÓPEZ FUENTES; C. H. MANDRINI; P. DÉMOULIN
Lugar:
Rio de Janeiro, Brasil
Reunión:
Congreso; XXVII Asamblea General de la Unión Astronómica Internacional; 2009
Institución organizadora:
Unión Astronómica Internacional
Resumen:
Peculiar solar active regions (ARs), such as delta islands and other high tilt bipoles, are commonly associated with the emergence of severely deformed magnetic flux tubes. Therefore, their study provides valuable information about the origin and evolution of magnetic structures in the solar interior. They are also of special interest because they produce the largest amount of flares and CMEs. Using data from the Solar and Heliospheric Observatory (SOHO) covering a full solar cycle, we analyze a set of 40 peculiar ARs. Studying the evolution of photospheric magnetograms (MDI) and combining coronal observations (EIT) with models of the magnetic field, we infer theirmagnetic helicity properties. We analyze and discuss how our results constrain different models of the evolution of emerging magnetic flux tubes.