Study of magnetic flux emergence and related activity in active region NOAA 10314 |
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Authors: | Mariano Poisson Marcelo López Fuentes Cristina H Mandrini Pascal Démoulin Etienne Pariat |
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Institution: | 1. Instituto de Astronomía y Física del Espacio (CONICET-UBA), CC 67 Suc 28, 1428 Buenos Aires, Argentina;2. Facultad de Ciencias Exactas y Naturales, UBA, Buenos Aires, Argentina;3. Observatoire de Paris, LESIA, Observatoire de Paris, CNRS, UPMC, Universit Paris Diderot, 92190 Meudon, France |
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Abstract: | We study the extremely complex active region (AR) NOAA 10314, that was observed from March 13–19, 2003. This AR was the source of several energetic events, among them two major (X class) flares, along a few days. We follow the evolution of this AR since the very first stages of its emergence. From the photospheric evolution of the magnetic polarities observed with SOHO/MDI we infer the morphology of the flux tube that originates the AR. Using a computation technique that combines Local Correlation Tracking with magnetic induction constrains, we compute the rate of magnetic helicity injection at the photosphere during the observed evolution. From our results we conclude that the AR originated by the emergence of a severely deformed magnetic flux tube having a dominantly positive magnetic helicity. |
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Keywords: | Solar active regions Magnetic flux emergence Magnetic helicity injection |
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