Selected field lines around the flux rope for the unstable model U. The four panels represent different iterations of the magnetofrictional relaxation. The green and red contours show the magnetogram of Fig. 2 overplotted on four AIA images (gray scale) showing the bright ribbons in the 304 Å filter. The iteration at n = 40 000 was zoomed in so as to show parts of the field lines escaping from the dome region. The other iterations are shown as a full field of view of the region, showing the different loops connecting to the bipole where the eruption takes place. The selected field lines both show the extension to a north and west location with a similar orientation as the ejection of filaments f1 and f2, seen in Fig. 1. In that location, there is an extension on the eastern side, hinting at a long-range interaction with the faculae region, and some loops connecting the remote ribbon brightening.
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