Etude de la couronne solaire en 3D et de son évolution avec SOHO ...

tel-00089354, version 1 - 17 Aug 2006
EIT IMAGES OF THE SOLAR CORONA 279
Figure 5. Magnification of the rebuilt wavelet image processed with the rough EIT image: The grid
pattern appears clearly and hides some structures. Negative LUT.
Figure 6. Size and dynamic range comparison with the same restricted area processed: SOHO/EIT
Fe IX/X taken the 7 April 1998 at 01:00 UT (negative LUT). (a) Reconstruction using the complete
data set 1024 × 1024 (b) Reconstruction using a restricted portion of the image.
4. Application: Link between Loops and Material Ejecta
We analyze now the active region NOAA 8100 from 5 November 1997, 20:00 UT
to the 6th before 12:00 UT. During that period, loop evolution appears to have
slower variations than we will describe below.
Figure 7. Sobel image of EIT image of Figure 6(a).