NRL Solar Physics Division OPEN ISSUES Energy Sources admits two distinct physical interpretations (Chen 1990; Chen and Krall 2003; Chen and Kunkel 2010) ‒ Coronal source: injection of flux from coronal field via reconnection (conventional) ‒ Subphotospheric source: injection of flux from the solar dynamo (Chen 1989, 1996) Neither interpretation has been theoretically or observationally proven ‒ Reconnection: physical dissipation mechanisms and large scale disparity ‒ Subphotospheric mechanism: none has been calculated Both are external physics in all current CME/flare models
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