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The Magnetic Topology of Coronal Mass Ejection sources View all abstracts by submitter

Ignacio Ugarte-Urra   Submitted: 2007-03-05 07:36

In an attempt to test current initiation models of coronal mass ejections (CMEs), with an emphasis on the magnetic breakout model, we inspect the magnetic topology of the sources of 26 CME events in the context of their chromospheric and coronal response in an interval of approximately nine hours around the eruption onset. First, we perform current-free (potential) extrapolations of photospheric magnetograms to retrieve the key topological ingredients, such as coronal magnetic null points. Then we compare the reconnection signatures observed in the high cadence and high spatial resolution of the Transition Region And Coronal Explorer (TRACE) images with the location of the relevant topological features. The comparison reveals that only seven events can be interpreted in terms of the breakout model, which requires a multi-polar topology with pre-eruption reconnection at a coronal null. We find, however, that a larger number of events (twelve) can not be interpreted in those terms. No magnetic null is found in six of them. Seven other cases remain difficult to interpret. We also show that there are no systematic differences between the CME speed and flare energies of events under different interpretations.

Authors: I. Ugarte-Urra, H.P. Warren, A.R. Winebarger
Projects: None

Publication Status: Accepted for publication in ApJ
Last Modified: 2007-03-05 08:40
Go to main E-Print page  Forward Modeling of Acoustic Wave Propagation in the Quiet Solar Subphotosphere  First limits on the 3-200 keV X-ray spectrum of the quiet Sun using RHESSI  Edit Entry  Download Preprint  Delete Entry 

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