Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.1203m&link_type=abstract
American Astronomical Society, SPD meeting #40, #12.03; Bulletin of the American Astronomical Society, Vol. 41, p.828
Astronomy and Astrophysics
Astronomy
Scientific paper
The importance of coronal sigmoids as progenitors of eruptions and mass ejections is well established. However, the storage of magnetic energy prior to a sigmoid's eruption is difficult to quantify. While the non-potentiality of the coronal force-free fields is clearly responsible for the free energy, models of the field are difficult to verify. We utilize a method, developed at Montana State University and described at this meeting by A. Malanushenko, to model the force-free field within a coronal sigmoid observed by TRACE and Hinode/XRT. By modeling the twist in the sigmoid's field over the span of a few days leading up to its eruption, it is hoped that such a model can yield insight to the buildup of energy. This work is supported by NASA contract NNX07AI01G, and by SAO contract SV7-77003.
Longcope Dana
Malanushenko Anna
McKenzie David Eugene
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