Eruption of a Multiple-Turn Helical Magnetic Flux Tube in a Large Flare: Evidence for External and Internal Reconnection that Fits the Breakout Model of Solar Magnetic Eruptions

摘要: We present observations and an interpretation of a unique multiple-turn spiral flux tube eruption from active region 10030 on 2002 July 15. The TRACE C IV clearly show that is helical erupting within sheared magnetic field. These are interpreted in the context breakout model for field explosions. initiation helix eruption, as determined by linear backward extrapolation, starts 25 s after peak flare's strongest impulsive spike microwave gyrosynchrotron radiation early explosive phase, implying core not site initial reconnection. Within quadrupolar configuration region, external internal reconnection sites identified each two consecutive eruptive flares produce double coronal mass ejection (CME). first apparently releases underlying allows it to erupt, leading wake helix. This heats two-ribbon flare. events lead CME followed second initiates larger halo CME. strong shear compatible with observed rapid proper motion evolution region. originates above sheared-field inversion line filament channel, erupt only fast has started. counter standard flare support initiation.