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|CURRENT SHEET ENERGETICS, FLARE EMISSIONS, AND ENERGY PARTITION IN |
|SIMULATED AND OBSERVED SOLAR ERUPTIONS |
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|K.K.Reeves, J.Linker, Z.Mikic, T.G.Forbes, D.Seaton, and S.Savage |
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|We investigate coronal energy flow during a simulated coronal mass |
|ejection (CME), and compare observable characteristics of the simulation|
|to observed eruptions. We model the CME using a 2.5D numerical MHD code |
|that includes coronal heating, thermal conduction and radiative cooling |
|in the energy equation. We examine the energy release in the current |
|sheet as the eruption takes place, and find, as expected, that the |
|Poynting flux is the dominant carrier of energy into the current sheet. |
|However, there is a significant flow of energy out of the sides of the |
|current sheet into the upstream region due to thermal conduction along |
|field lines and viscous drag. This energy outflow is spatially |
|partitioned into three separate components, namely the energy flux |
|flowing out the sides of the current sheet, the energy flowing out the |
|lower tip of the current sheet, and the energy flowing out the upper tip|
|of the current sheet. The energy flow through the lower tip of the |
|current sheet is the energy available for heating of the flare loops. We|
|examine the simulated flare emissions and energetics due to the modeled |
|CME and find reasonable agreement with flare loop morphologies and |
|energy partitioning in observed solar eruptions. The simulation also |
|provides an explanation for coronal dimming during eruptions, and |
|predicts that the structures surrounding the current sheet can been seen|
|in XRT and AIA observations. |