FORMATION OF TORUS-UNSTABLE FLUX ROPES AND ELECTRIC CURRENTS IN ERUPTING SIGMOIDS

By G. Aulanier, Tibor Török, P. Démoulin, E. DeLuca. 2009

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In Astronomy and Astrophysics

Citations in the corpus

CRITERIA FOR FLUX ROPE ERUPTION: NON-EQUILIBRIUM VERSUS TORUS INSTABILITY (2010, methodology): “With reconnection of sheared loops at the PIL, an important fraction of the currents are inside a twisted flux tube (Aulanier et al. 2010, and references therein).”
DIFFERENTIAL EMISSION MEASURE ANALYSIS OF MULTIPLE STRUCTURAL COMPONENTS OF CORONAL MASS EJECTIONS IN THE INNER CORONA (2012, methodology): “…the hot channel plays in the eruption process appears similar to that of flux ropes in the modeling and simulations of CMEs (e.g., Chen 1996; Chen & Shibata 2000; Lin & Forbes 2000; Török & Kliem 2005; Kliem & Török 2006; Aulanier et al. 2010; Fan & Gibson 2007; Fan 2010; Olmedo & Zhang 2010).”
ELECTRIC CURRENTS IN FLARE RIBBONS: OBSERVATIONS AND THREE-DIMENSIONAL STANDARD MODEL (2014, methodology): “The simulations for the torus instability conditions of a flux rope were also performed and the results published (Aulanier et al. 2010) well before the presently studied flare occurred on the Sun.”
EVOLUTION OF MAGNETIC FIELD AND ENERGY IN A MAJOR ERUPTIVE ACTIVE REGION BASED ON SDO/HMI OBSERVATION (2011, methodology): “In a detailed account of the coronal activities in this event, Schrijver et al. (2011) use MHDmodeling (Aulanier et al. 2010) to interpret the ob- servations and find that the flux-rope formed by reconnection eventually erupts as part of the CME structure.”
The Origin, Early Evolution and Predictability of Solar Eruptions (2018, background): “This is also in line with the theoretical findings that sigmoids are created by hot plasma along field lines in the vicinity of a quasi-separatrix layer formed in flux rope topology (Titov and Démoulin, 1999).”
The standard flare model in three dimensions - III. Slip-running reconnection properties (2013, background): “They reconnect at low height, additionally building up the flux rope, which was already partly formed in the pre-eruptive phase (see Aulanier et al. 2010).”
The standard flare model in three dimensions - I. Strong-to-weak shear transition in post-flare loops (2012, methodology): “In the driven simulation which brought the system up to this reinitialized t = 0, these loops had already formed by means of a tethercutting reconnection type, thus contributing in the flux rope formation and rise in altitude up to its eruptive threshold (Aulanier et al. 2010).”
A MODEL FOR MAGNETICALLY COUPLED SYMPATHETIC ERUPTIONS (2011, background): “The slow rise lasts until the rope reaches the critical height for TI onset at t ≈ 40 τa, after which it rapidly accelerates upward driven by the instability (Török & Kliem 2007; Fan & Gibson 2007; Schrijver et al. 2008; Aulanier et al. 2010).”
OBSERVING FLUX ROPE FORMATION DURING THE IMPULSIVE PHASE OF A SOLAR ERUPTION (2011, background): “Considerable efforts have also been made in numerical MHD simulations to study the formation and dynamic behavior of flux ropes (Amari et al. 2000, 2003; Aulanier et al. 2010; Fan & Gibson 2003, 2004).”
The standard flare model in three dimensions II: upper limit on solar flare energy (2012, methodology): “The simulation settings are thoroughly described in Aulanier et al. (2010, 2012).”
Solar filament eruptions and their physical role in triggering Coronal Mass Ejections (2012, methodology): “Let us understand, with an analytical analysis, the physical mechanisms which are working until the eruption in the Aulanier et al. (2010) simulation (Figure 11).”
DIRECT EVIDENCE FOR A FAST CORONAL MASS EJECTION DRIVEN BY THE PRIOR FORMATION AND SUBSEQUENT DESTABILIZATION OF A MAGNETIC FLUX ROPE (2012, background): “…rope could have lifted it to altitudes where the overlying constraining magnetic field gradients are stronger, thus facilitating the onset of the torus instability as discussed in a number of series of recent MHD modeling investigations (e.g., Aulanier et al. 2010; Fan 2010; Savcheva et al. 2012).”
Photospheric flux cancellation and associated flux rope formation and eruption (2010, background): “The transition beginsby splitting the bald patch into two sections, with the HFT connecting their inner end points through the corona.”