Physics
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..368..499f&link_type=abstract
The Physics of Chromospheric Plasmas ASP Conference Series, Vol. 368, Proceedings of the conference held 9-13 October, 2006 at t
Physics
4
Scientific paper
Updated modeling of the ``quiet'' Sun low chromosphere based on existing observations show that at least all the data we examined in detail is consistent with a single model that has a very low temperature minimum and a sharp temperature increase above it. Such a model explains simultaneously the deep CO lines observed on the disk and off the limb, as well as the UV and radio continua and thus solves the controversy regarding the minimum temperature without resorting to ``bifurcation''. This results simply from considering both: the spatial extent of the intensity contribution functions, and non-LTE. The model also shows that the structure of the low-chromosphere cannot be unambiguously inferred from any simple diagnostic but rather needs to be examined by forward modeling with consideration of full-NLTE radiative transfer and observations at many wavelengths. In addition, the characteristics of this model are consistent with the magnetic heating of the chromosphere. The mechanism proposed consists of small scale magnetic fields and sudden triggering of their free-energy dissipation by a plasma instability starting at the base of the chromospheric plateau. As a result of such a mechanism a complex spatial structure would result in the upper chromosphere that can hardly be explained in terms of shocks but instead shows magnetic patterns.
Balasubramaniam K. S.
Fontenla Juan Manuel
Harder Jens
No associations
LandOfFree
Chromospheric Heating and Low-Chromosphere Modeling does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Chromospheric Heating and Low-Chromosphere Modeling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chromospheric Heating and Low-Chromosphere Modeling will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-765425