Title: Thermal non-equilibrium in coronal loops: A road to complex evolution
Authors: Müller, Daniel A. N.
De Groof, Anik
Hansteen, Viggo H.
Peter, Hardy #
Issue Date: Nov-2004
Publisher: Cambridge University Press
Host Document: IAUS vol:223 pages:289-290
Conference: IAU Symposium: Multi-Wavelength Investigations of Solar Activity edition:223 location:St. Petersburg, Russia date:14-19 June 2004
Abstract: At high spatial and temporal resolution, coronal loops are observed to have a highly dynamic nature. Recent observations with SOHO and TRACE frequently show localized brightening "raining" down towards the solar surface. What is the origin of these features? Here we present for the first time a comparison of observed intensity enhancements from an EIT shutterless campaign with non-equilibrium ionization simulations of coronal loops in order to reveal the physical processes governing fast flows and localized brightening. We show that catastrophic cooling around the loop apex as a consequence of footpoint-concentrated heating offers a simple explanation for these observations. An advantage of this model is that no external driving mechanism is necessary as the dynamics result entirely from the non-linear character of the system.
ISBN: 0-521-851955
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Plasma-astrophysics Section
# (joint) last author

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