2.5 Unified model for flares, microflares, and jets
Figure 11 illustrates a unified model that can explain large-scale flares, small-scale flares, flare-like
phenomena accompanied by plasmoid ejection on the basis of magnetic reconnection (Shibata, 1999). In the
case of large-scale flares, a plasmoid is located in a vertical current sheet formed inside a magnetic arcade,
while in the case of small-scale flares, a plasmoid sits in a current sheet formed at the interface between
emerging and preexisting fields. In both cases, the ejection of a plasmoid from a current sheet triggers fast
magnetic reconnection, producing a flare and flare-like phenomenon (Section 4.1.6). Tables 1 – 4
summarize the feature of flares and flare-like phenomena (Shimojo et al., 2007).
Figure 11: Unified model for solar eruptions (Shibata et al., 1995; Shibata, 1999). Top: Pre-eruption
(left) and post-eruption (right) states of a large-scale eruption. Bottom: Pre-eruption (left) and
post-eruption (right) states of a small-scale eruption.