Comparison Of Simulated And Observed Loop-top Emission In Flares Using The AIA Telescopes On SDO

Astronomy and Astrophysics – Astronomy

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Scientific paper

We investigate the temporal behavior of loop-top emission in flaring loops observed by AIA's six EUV passbands for several flares of different sizes. These flares are chosen because they exhibit extended periods of loop-top emission in the 193 A channel, thought to be hot emission from Fe XXIV. The flare light curves from this loop-top emission clearly show the progression of flare cooling through the various ionization states of iron that dominate the AIA bands. We use the model of Reeves, Warren & Forbes (2007), which predicts extended periods of loop-top flare emission, to model the flare loop energization, and explore the effects of different energy release rates and durations on the simulated flare light curves. We also explore the conditions under which non-equilibrium ionization effects may be important in these events.

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