Kappa-distribúcie a ohrev koróny; Kappa-distribúcie a ohrev koróny; Kappa-distributions and coronal heating.
Abstract
Particle energy kappa-distributions (distributions with non-thermal tails) have been diagnosed in plasma of the transition region and also in solar flares. Theoretical models suggest a link between kappa-distributions and dynamic heating of the corona. Since the presence of non-thermal distributions leads to changes in intensities of emission lines, we have examined their effect on the total radiation losses of the corona as well as responses of the EUV and X-ray filters. Temperature responses of the filters are wider for kappa-distributions than in the case of the Maxwell distribution, and their respective maxima are shifted towards higher temperatures. On the other hand, the total radiation losses of the corona are lower compared to the Maxwell distribution except for the extreme non-thermal case. This means that lower heating energy is needed to reach the same corona temperature in case of kappa-distributions. In this work we discuss the effect of element abundances and specific ions on the total radiation losses of the corona.
- Publication:
-
20th National Solar Physics Meeting
- Pub Date:
- December 2010
- Bibcode:
- 2010nspm.conf..161D