Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003csss...12..230g&link_type=abstract
The Future of Cool-Star Astrophysics: 12th Cambridge Workshop on Cool Stars , Stellar Systems, and the Sun (2001 July 30 - Augus
Astronomy and Astrophysics
Astrophysics
Numerical Mhd, Coronal Heating, Magnetic Carpet
Scientific paper
The discovery of the magnetic carpet on the sun, the continuously changing of small scale magnetic flux elements in the solar atmosphere, indicates that the life time of individual flux elements is less than one day. During this time the elements interact with each other and eventually become impossible to identify individually. The complexity of the coronal magnetic field relating to this source distribution provides a complex pattern of overlying field line connectivity, with one flux element connecting possibly to several other flux elements. Stressing such a complex magnetic field by movements of the flux sources in the photosphere, must lead undoubtfully to the formation of many localised current concentrations that can provide local heating for the transition region and lower coronal plasma. In this paper we investigate a simple flux interaction event between two unbalanced magnetic sources. Using a numerical MHD approach we examine when and how the free magnetic energy may be released when the flux patches are rotated relative to one another. It is found that this topological simple magnetic configuration does not reach easily a state where a measure of the imposed stress is released on a short dynamical time scale.
Galsgaard Klaus
Walsh Rob
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