Vol 5, No 6

A Parametric Survey of the CME Triggering Process by Numerical Simulations

Xiao-Yan Xu, Peng-Fei Chen, Cheng Fang


Abstract Observations indicate that solar coronal mass ejections (CMEs) are closely associated with reconnection-favored flux emergence, which was explained in the emerging flux trigger mechanism for CMEs by Chen & Shibata based on numerical simulations. We present a parametric survey of the triggering agent: its polarity orientation, position, and the amount of the unsigned flux. The results suggest that whether a CME can be triggered depends on both the amount and location of the emerging flux, in addition to its polarity orientation. A diagram is presented to show the eruption and non-eruption regimes in the parameter space. The work is aimed at providing useful information for the space weather forecast.


Keywords Sun: coronal mass ejections (CMEs)---Sun: filaments

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