Presentation 1 : Poster
Transition Region Dynamical Components
R. Ben Hadj, A.H. Gabriel
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.