MAGNETIC FIELD STRUCTURES TRIGGERING SOLAR FLARES AND CORONAL MASS EJECTIONS
By Kanya Kusano, Y. Bamba, T. Yamamoto, Y. Iida, S. Toriumi, Ayumi Asai. 2012
166 citations recorded by the source corpus.
Solar flares and coronal mass ejections, the most catastrophic eruptions in our solar system, have been known to affect terrestrial environments and infrastructure. However, because their triggering mechanism is still not sufficiently understood, our capacity to predict the occurrence of solar eruptions and to forecast space weather is substantially hindered. Even though various models have been proposed to determine the onset of solar eruptions, the types of magnetic structures capable of triggering these eruptions are still unclear. In this study, we solved this problem by systematically surveying the nonlinear dynamics caused by a wide variety of magnetic structures in terms of three-dimensional magnetohydrodynamic simulations. As a result, we determined that two different types of small magnetic structures favor the onset of solar eruptions. These structures, which should appear near the magnetic polarity inversion line (PIL), include magnetic fluxes reversed to the potential component or the nonpotential component of major field on the PIL. In addition, we analyzed two large flares, the X-class flare on 2006 December 13 and the M-class flare on 2011 February 13, using imaging data provided by the Hinode satellite, and we demonstrated that they conform to the simulation predictions. These results suggest that forecasting of solar eruptions is possible with sophisticated observation of a solar magnetic field, although the lead time must be limited by the timescale of changes in the small magnetic structures.
Subfields: Astronomy and Astrophysics, Geophysics
View Paper: https://www.semanticscholar.org/paper/dc6baecd731d258d8660322cf1c9d412e57f8a57
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In Astronomy and Astrophysics
- G. Aulanier
- Brigitte Schmieder
- P. Démoulin
- Nat Gopalswamy
- Etienne Pariat
- S. Yashiro
- M. Janvier
- C. Schrijver
In Geophysics
Citations in the corpus
- Solar filament eruptions and their physical role in triggering Coronal Mass Ejections (2012, background): “…Wheatland, 2007; Canou et al., 2009; Amari et al., 2010), the upward integration (Wu and Guo, 1999), the magneto frictional (Valori et al., 2005; Kusano et al., 2012; Valori et al., 2012), the optimization (Wiegelmann, 2008; Guo et al., 2010a, 2012), and the boundary element (Green’s function…”
- History and development of coronal mass ejections as a key player in solar terrestrial relationship (2016, result): “This is also consistent with models in which the flux rope is formed due to reconnection (Kusano et al. 2012).”