A Breakout Model for Solar Coronal Jets with Filaments

Abstract

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Observations and 3D Magnetohydrodynamic Modeling of a Confined Helical Jet Launched by a Filament Eruption

“…Figure 4 (and the associated movie) showed that the brightening associated with breakout reconnection occurred simultaneously with the brightening from flare reconnection. This could be consistent with slow, low energy breakout reconnection prior to the eruption that speeds up once flare reconnection is initiated (as in Karpen et al (2012);Wyper et al (2018); Kumar et al (2018) for example). Or equally the breakout reconnection could be reactionary, following from the eruption of the filament driven by an ideal instability (as suggested by e.g.…”

“…However, the basic physics is the same in the two models. In this sense, the current simulation bridges the gap between the large-scale confined eruption simulations of DeVore & and the open-field jet simulations of Wyper et al (2017Wyper et al ( , 2018.…”

“…One further aspect of the field line evolution that is worthy of mention is that once the erupting flux rope is reconnected, the flare reconnection after this time transfers the flux moved into the side lobe regions in the breakout phase back into the overlying field and strapping flux regions, Figure 9(d) (red and cyan field lines). As discussed in detail in Wyper et al (2018), once the flux rope is reconnected the null in the breakout current layer moves into the flare current layer beneath the erupting structure. Thus, the new flare loops formed after this time (flare loops 2) are through null point reconnection as opposed to tether cutting/slipping reconnection prior to this.…”

“…The potential field initial condition is constructed using multiple sub-surface magnetic dipoles in the manner of Wyper et al (2016); Wyper et al (2018). The positive polarity of the small bipole forms a minority polarity patch relative to the large-scale background field.…”

“…These observations provide a unique perspective of the area surrounding the filament eruption and also the inferred magnetic field topology prior to the flare. To aid in our interpretation we refer to a modification of the Wyper et al (2017Wyper et al ( , 2018 jet model, where a filament channel eruption launches a jet confined along coronal loops. The details of the observations are given in §2 and §3 to §5 describe the filament eruption and jet.…”