Destabilization, interaction, and eruption of filaments on the sun and associated phenomena

Porfir'eva, G. A.; Yakunina, G. V.

doi:10.1134/s0016793213080215

Cited by 1 publication

(1 citation statement)

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“…The eruptions of stable filaments are triggered by the loss of the balance of forces acting on them (Porfir'eva & Yakunina 2013;Kliem et al 2014;Zaitsev & Stepanov 2018). Several different mechanisms have been proposed and studied for the initiation of filament eruption, such as flux emergence and cancellation (Zhang et al 2001;Zheng et al 2017;Dacie et al 2018), tether cutting reconnection (Moore et al 2001;Cheng & Ding 2016;Woods et al 2018), breakout reconnection (Sterling et al 2011;Kliem et al 2013;Sun et al 2015;Chen et al 2016), and torus or kink magnetohydrodynamic (MHD) instability Riley et al 2011;Hassanin & Kliem 2016;Dechev et al 2018;Hou et al 2018;Duchlev et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Sympathetic Eruptions of Two Filaments with an Identifiable Causal Link Observed by the Solar Dynamics Observatory

Song

Hou

Zhang

et al. 2020

ApJ

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Filament eruptions occurring at different places within a relatively short time internal, but with a certain physical causal connection are usually known as sympathetic eruption. Studies on sympathetic eruptions are not uncommon. However, in the existed reports, the causal links between sympathetic eruptions remain rather speculative. In this work, we present detailed observations of a sympathetic filament eruption event, where an identifiable causal link between two eruptive filaments is observed. On 2015 November 15, two filaments (F1 in the north and F2 in the south) were located at the southwestern quadrant of solar disk. The main axes of them were almost parallel to each other. Around 22:20 UT, F1 began to erupt, forming two flare ribbons. The southwestern ribbon apparently moved to southwest and intruded southeast part of F2. This continuous intrusion caused F2's eventual eruption. Accompanying the eruption of F2, flare ribbons and post-flare loops appeared in northwest region of F2. Meanwhile, neither flare ribbons nor post-flare loops could be observed in southeastern area of F2. In addition, the nonlinear force-free field (NLFFF) extrapolations show that the magnetic fields above F2 in the southeast region are much weaker than that in the northwest region. These results imply that the overlying magnetic fields of F2 were not uniform. So we propose that the southwest ribbon formed by eruptive F1 invaded F2 from its southeast region with relatively weaker overlying magnetic fields in comparison with its northwest region, disturbing F2 and leading F2 to erupt eventually.

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