Pre-reconnected and post-reconnected field lines. Magnetic field model showing the two BPs and a set of pre-reconnected and reconnected field lines as inferred when comparing with observations. a) The blue solid lines would correspond to the situation before reconnection, while the set of red continuous lines issued from the separatrix located at the photospheric level would correspond to the lines after reconnection. This panel is shown from the point of view of the observer. b) This is the same set of field lines as in panel a) drawn from a different perspective so that the field connectivity becomes clear. We also added arrows to the computed lines to indicate the direction of the magnetic field and we added numbers to some of them to explain how reconnection can proceed (see Sect. 5.2.2). The height of these field lines was multiplied by a factor of four so that they can be clearly distinguished. The conventions for the field isocontours, axes, BPs, and separatrices are the same as in Fig. 10.
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