A comparison of high-temperature flare models with observations and implications for the low-temperature flare.
Abstract
EUV data from the Harvard College Observatory and Naval Research Laboratory instruments on board the Skylab Apollo telescope mount, together with SOLRAD 9 X-ray data, are analyzed in order to empirically deduce the variation of emission measure with temperature in the atmosphere of a number of solar flares. A 'mean' differential emission measure profile Q(T) for a flare is constructed which is then compared with the profile predicted by a number of theoretical models. It is found that realistic flare models must include both conductive and radiative terms in the energy equation, and that hydrodynamic terms may be important at low temperatures. The implications of the results obtained are discussed for flare models in general and it is shown that the inclusion of the conductive term into models which have hitherto neglected it can perhaps resolve some of the observational difficulties with such models.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- September 1979
- DOI:
- 10.1086/157353
- Bibcode:
- 1979ApJ...232..903M
- Keywords:
-
- Plasma Temperature;
- Solar Flares;
- Spaceborne Astronomy;
- Ultraviolet Astronomy;
- Far Ultraviolet Radiation;
- H Alpha Line;
- Skylab Program;
- Solar Corona;
- Stellar Models;
- Solar Physics;
- Solar Flares:Models