Emission measure distributions of solar eruptive events

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• Dr. Iain Hannah (University of Glasgow)
• Tuesday 26 November 2013, 13:00-14:00
• MR14, Centre for Mathematical Sciences, Wilberforce Road, Cambridge.

If you have a question about this talk, please contact Dr. Jaroslav Dudik.

The current wealth of temperature sensitive solar observations presents a unique opportunity to study energy release in solar eruptive events (flares and CMEs). Data from SDO and Hinode gives an unprecedented view of dynamical heating in the solar atmosphere but to fully exploit this resource the underlying thermal properties of the emitting plasma (Emission Measure Distribution, EDM ) needs to be recovered. This is difficult as it is an ill-posed inverse problem and, in the case of SDO /AIA, there is an overwhelming amount of data. Our recently implemented regularized inversion method (Hannah & Kontar A&A 2012, 2013) can quickly and robustly find the EMD solution (and its uncertainties), with the resulting EM maps allowing the temperature and density evolution to be studied both spatially and temporally. I will present EMDs of flares, microflares and eruptions, discussing the thermal and heating properties, as well as comparing this to the non-thermal energy input derived from RHESSI hard X-ray observations.

This talk is part of the DAMTP Astro Lunch series.

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