Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002sf2a.conf..123b&link_type=abstract
SF2A-2002: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 24-29, 2002, Eds.: F. Combes and D. Barret,
Astronomy and Astrophysics
Astrophysics
Scientific paper
Certain coronal heating theories (eg. Axford and Mc Kenzie, 1993) propose that small loops of new magnetic fields are born in cell centers of supergranulation. They are carried by convection to the network where they reconnect with network field, liberating magnetic energy. We are looking for observational evidence for this phenomenon. We use the differential emission measure (DEM) analysis to identify the plasma associated with these loops.It is reasonable to suppose that their DEM contribution will be of a diffrent form in the cells that in the network where they are destroyed.For first part of this analysis, we develop a numerical technique, using CHIANTI spectroscopic database, to calculate the DEM from our observed spectral intensities. The question which remains, is that of the treatment of the cells alone by separating them from the network. For this we use image analysis techniques wich avoids errors introduced by the use of histogram method.We measure DEM in cells and network to be able to deduce the loops.
Ben El Hadj R.
Gabriel Alan H.
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