INVESTIGADORES
MANDRINI Cristina Hemilse
congresos y reuniones científicas
Título:
Magnetic flux emergence, flares, and coronal mass ejections
Autor/es:
MANDRINI, C.H.; SCHMIEDER, B.; CRISTIANI, G.D.; DÉMOULIN, P.; GUO, Y.
Lugar:
Moscú
Reunión:
Congreso; 40th COSPAR Scientific Assembly; 2014
Institución organizadora:
Committee on Space Research
Resumen:
We study the violent events
occurring in the cluster of two active regions (ARs), NOAA numbers 11121 and
11123, observed in November 2010 with instruments onboard the Solar Dynamics
Observatory and from Earth. Within one day the total magnetic flux increased by
70 per cent with the emergence of new groups of bipoles in AR 11123. These
emergences led to a very complex magnetic configuration in which around ten
solar flares, some of them accompanied by coronal mass ejections (CMEs),
occurred. A magnetic-field topology somputation indicates the presence of null
points, associated separatrices and quasi-separatrix layers (QSLs) where
magnetic reconnection is prone to occur. Based on this analysis, we propose a
scenario to explain the origin of a low-energy event preceding a filament
eruption, which is accompanied by a two-ribbon flare and CME, and a consecutive
confined flare in AR 11123. The results of our topology computation can also
explain the locations of flare ribbons in two other events, one preceding and
one following the ones just mentioned.