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The long-term evolution of active regions, multi-wavelength flux and heating studies: observations and theory

Published online by Cambridge University Press:  14 March 2005

P. Démoulin
P. Démoulin
Affiliation:
Observatoire de Paris, LESIA, UMR 8109 (CNRS), F-92195 Meudon Cedex, France
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Abstract

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Analyzing the long-term evolution of active regions (ARs) permits to quantify the link between their atmospheric emission (from optical to X-rays) and the magnetic field. Multi-wavelength studies provide the full story, and not just a snapshot, of the phenomena and they allow us analyze how the atmosphere changes as the field strength decreases (with the dispersion of the AR).

The evolution of the emitted flux in various wavelength ranges contains information on the heating mechanism(s) of the different atmospheric levels. I review what we can learn from such long-term (months) multi-wavelength observations, and compare the results to other solar and stellar studies.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS223 , June 2004 , pp. 13 - 22
Copyright
© 2004 International Astronomical Union