Disintegration of an eruptive filament via interactions with quasi-separatrix layers

Li, Rui; Wang, Yuming

doi:10.1007/s11433-017-9147-x

Cited by 22 publications

(13 citation statements)

References 51 publications

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“…In recent years, a series of comparative studies about the eruptive, confined (failed) and partial eruption have been done (e.g., Shen 2011;Liu et al 2018a). It is shown that some parameters, i.e., the decay index, field strength at low corona etc., had no significant difference for failed and successful eruption (Shen 2011).…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Multi-wavelength Observation of a Failed Eruption from a Helical Kink-unstable Prominence

Xu,

Su,

Chen

et al. 2020

Preprint

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Multi-wavelength observations of prominence eruptions provide an opportunity to uncover the physical mechanism of the triggering and the evolution process of the eruption. In this paper, we investigated an erupting prominence on October 14, 2012, recorded in Hα, EUV, and X-ray wavelengths. The process of the eruption gives evidences on the existence of a helical magnetic structure showing the twist converting to writhe. The estimated twist is ∼ 6π (3 turns), exceeding the threshold of the kink instability. The rising plasma reached a high speed at 228 km s −1 , followed by a sudden rapid acceleration at 2715 m s −2 , and synchronous with a solar flare. Co-spatial cusp shaped structures were observed in both AIA 131 Å and 94 Å images, signifying the location of the magnetic reconnection. The erupted flux rope finally undergone a deceleration with a maximum value of 391 m s −2 , which is larger than the free-fall acceleration on the Sun (273 m s −2 ), suggesting that the eruption finally failed, possibly due to an inward magnetic tension force.

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Section: Conclusion and Discussionmentioning

confidence: 99%

Multi-wavelength Observation of a Failed Eruption from a Helical Kink-unstable Prominence

Xu,

Su,

Chen

et al. 2020

Preprint

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“…Alternatively, confined eruptions often occur below a dome-shaped magnetic fan surface with a coronal magnetic null point. (e.g., Masson et al 2009;Liu et al 2018c;Yang & Zhang 2018). A magnetic null facilitates the onset of magnetic reconnection because oppositely directed flux exists there in close proximity.…”

Section: Confinementmentioning

confidence: 99%

Partial Eruption, Confinement, and Twist Buildup and Release of a Double-decker Filament

Chen,

Su,

Liu

et al. 2021

Preprint

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We investigate the failed partial eruption of a filament system in NOAA AR 12104 on 2014 July 5, using multiwavelength EUV, magnetogram, and Hα observations, as well as magnetic field modeling. The filament system consists of two almost co-spatial segments with different end points, both resembling a C shape. Following an ejection and a precursor flare related to flux cancellation, only the upper segment rises and then displays a prominent twisted structure, while rolling over toward its footpoints.

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“…Flare activity was also discovered on the solar-type stars other than the Sun (Schaefer et al 2000;Benz & Güdel 2010;Shibata & Magara 2011;Maehara et al 2012;Notsu et al 2013;Shibayama et al 2013;Balona 2015;Davenport 2016). Solar flares commonly come from solar active regions (ARs), and the magnetic configuration of flare-bearing ARs is one key aspect for understanding the initiation and evolution of solar flares (e.g., Chen et al 2012;Sun et al 2015;Jiang et al 2016Jiang et al , 2018Liu et al 2016;Cheng et al 2017;Guo et al 2017;Hao et al 2017;Inoue et al 2018) and other related eruptive phenomena in the solar atmosphere (e.g., Zhang et al 2012;Ouyang et al 2017;Wang et al 2017;Liu et al 2018). The non-potential property of the magnetic fields with electric current permeating inside is believed to be the critical aspect related to the activity level of ARs (e.g., Wang et al 1996;Leka & Barnes 2003;Schrijver 2016).…”

Section: Introductionmentioning

confidence: 99%

Chirality and magnetic configuration associated with two-ribbon solar flares: AR 10930 versus AR 11158

Wang

Yan

et al. 2020

Advances in Space Research

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The magnetic configuration of flare-bearing active regions (ARs) is one key aspect for understanding the initiation of solar flares. In this paper, we perform a comparative analysis on the chiral characteristics and the magnetic configurations of two X-class two-ribbon flares happening in AR 10930 and AR 11158, whose photospheric magnetic fields were observed by the Hinode and SDO satellites, respectively. The corresponding coronal magnetic fields were calculated based on the nonlinear forcefree field model. It is found that both the flares were initiated in local areas with extremely strong electric current density. The chirality of the magnetic field (indicated by the sign of force-free factor α) along the main polarity inversion line (PIL) is opposite for the two ARs, that is, left-handed (α < 0) for AR 10930 and right-handed (α > 0) for AR 11158. The analysis shows that, for both flare events, prominent magnetic connectivity (indicated by both high α and strong current distributions) was formed above the main PIL before the flare and was totally broken after the flare eruption. Yet the two branches of broken magnetic connectivity, combined with the isolated electric current at the magnetic connectivity breaking site, compose the opposite magnetic configurations for the two ARs owing to their opposite chiral characteristics. That is, Z-shaped configuration for AR 10930 with negative α and left-handed chirality, and inverse Z-shaped configuration for AR 11158 with positive α and right-handed chirality. We speculate that two-ribbon flares can be generally classified to these two magnetic configurations by chirality (α sign) of ARs.

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Disintegration of an eruptive filament via interactions with quasi-separatrix layers

Cited by 22 publications

References 51 publications

Multi-wavelength Observation of a Failed Eruption from a Helical Kink-unstable Prominence

Multi-wavelength Observation of a Failed Eruption from a Helical Kink-unstable Prominence

Partial Eruption, Confinement, and Twist Buildup and Release of a Double-decker Filament

Chirality and magnetic configuration associated with two-ribbon solar flares: AR 10930 versus AR 11158

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