Abstract
Abstract : The overall goal of this proposal has been to describe the emergence, evolution, and eruption of magnetic flux ropes in the %corona. The following achievements are noted: 1. A numerical model of magnetic flux emergence (Fan and Gibson, 2003;2004,' Fan, 2005), demonstrating both flux rope equilibria and instabilities leading to eruptions. 2. A numerical model of dynamic magnetic flux emergence (Manchester et at., 2004; Fan, 2004). 3. A comparison of model predictions to CME precursor observations, including X-ray sigmoids and associated filaments, and rotating sunspots (Gibson et at., 2004; 2005a), and a comprehensive observational analysis of white light cavities in quiescent streamers (Gibson et at., 2005b). 4. An analytic flux rope model (Gibson et at., 2002) allowing parameterized studies of magnetic free energy 5. Tests of standard observational analysis techniques such as helicity injection (Gibson et at., 2004), inference of magnetic twist (Leka et at., 2005), and coronal field extrapolations (Barnes et at., 2005a; 2005b). 6. A comparison of equilibrium states, eruptive properties and observables for 3D vs. 2D models (Fan and Gibson, 2005) 7. A comparison of flux rope simulations with sigmoid evolution, including the demonstration of partially erupting flux ropes.
Published Version
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