Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.0502t&link_type=abstract
American Astronomical Society, SPD meeting #42, #5.02; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
The Minimum Current Corona (MCC) model provides a way to estimate stored coronal energy using the number of field lines connecting regions of positive and negative photospheric flux. MCC assumes that the amount of flux connecting pairs of regions is fixed, even as the photospheric field evolves. As the fixed flux in each domain becomes increasingly different from a potential field configuration the system builds up magnetic free energy. We have developed a method for quantifying the field evolution by tracking photospheric magnetic sources measured with SDO/HMI, and therefore energy storage. In particular, we present an algorithm quantifying the flux evolution of each pair of regions due to submergence and emergence through the photosphere. We have applied this method to NOAA Active Region 11112, which underwent a GOES M--2.9 class flare around 19:00 on Oct. 16, 2010, and calculated a free magnetic energy buildup of 8x1030 ergs over 3 days.
This work was supported NASA LWS.
Longcope Dana
Tarr Lucas
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