Astronomy and Astrophysics – Astronomy
Scientific paper
May 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21640504w&link_type=abstract
American Astronomical Society, AAS Meeting #216, #405.04; Bulletin of the American Astronomical Society, Vol. 41, p.889
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We consider magnetic energy storage in a force-free model corona with bipolar boundary conditions at the coronal base. Unlike the usual dipole, our boundary conditions are asymmetric, with the bipolar structure centered in one hemisphere. We explore the role of latitudinal position and extent of the bipolar structure on the amount of energy that can be stored by longitudinal shearing of the magnetic footpoints. As found earlier for dipolar and quadrupolar boundary conditions, our solutions develop detached flux ropes, whose energy can exceed that of the corresponding open field. We compare this energy with that of previously-examined configurations, and with the energy needed to drive coronal mass ejections.
This work is funded by NSF grant AGS0940503 to Middlebury College.
Kennedy Matthew
Wolfson Richard
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