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Fig. 2

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Fragmentation of the current sheet between merging plasmoids (a.k.a. fragmenting coalescence, see Bárta et al. 2011; Karlický & Bárta 2011). Figure displays the current density jz-component (red-blue scale = negatively-positively oriented), magnetic field (black field lines), the lines of Bx = 0 and By = 0 (red and green lines, respectively), and the magnetic null points (X-points: cyan crosses, O-points: magenta squares). Panel a) shows a larger view on the merging of two plasmoids in time t = 6000. Panel b) displays the situation at the same time but zoomed to the area around the positive CS formed between the merging plasmoids. Panel c) shows formation of the new X-O pair around x = 0, y = 1350 (marked by the gold ellipse) in time t = 6150. Even further fragmentation in the already decaying CS between the plasmoids is seen at t = 6700 in panel d) (gold ellipses).

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