SSP seminar

Current Sheet Energetics, Flare Emissions, and Energy Partition in a Simulated Solar Eruption

Kathy Reeves (CfA)

Monday 31st January 2011, 12:00 noon
Pratt conference room, 60 Garden Street

We investigate coronal energy flow during a simulated coronal mass ejection (CME). We model the CME in the context of the global corona using a 2.5D numerical MHD code in spherical coordinates 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. 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 are visible in AIA and XRT observations.


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