Journal ArticleDOI
The Torus instability
Bernhard Kliem,Tibor Torok +1 more
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TLDR
In this paper, the expansion instability of a toroidal current ring in low-beta magnetized plasma is investigated, and the results are verified with experiments on spheromak expansion and with essential properties of solar coronal mass ejections.Abstract:
The expansion instability of a toroidal current ring in low-beta magnetized plasma is investigated. Qualitative agreement is obtained with experiments on spheromak expansion and with essential properties of solar coronal mass ejections, unifying the two apparently disparate classes of fast and slow coronal mass ejections.read more
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Journal ArticleDOI
Two-stage evolution of an extended C-class eruptive flaring activity from sigmoid active region NOAA 12734: SDO and Udaipur-CALLISTO observations
Bhuwan Joshi,Prabir K. Mitra,R. Bhattacharyya,Kushagra Upadhyay,Divya Oberoi,K. Sasikumar Raja,Christian Monstein +6 more
TL;DR: In this article, the authors present a multi-wavelength investigation of a C-class flaring activity that occurred in the active region NOAA 12734 on 8 March 2019 using data from AIA and HMI on board the SDO and the Udaipur-CALLISTO solar radio spectrograph of the Physical Research Laboratory.
Journal ArticleDOI
The causes of quasi-homologous CMEs
Lijuan Liu,Lijuan Liu,Yuming Wang,Rui Liu,Zhenjun Zhou,Manuela Temmer,Julia K. Thalmann,Jiajia Liu,Kai Liu,Chenglong Shen,Quanhao Zhang,Astrid M. Veronig +11 more
TL;DR: In this article, the magnetic source locations of 142 quasi-homologous (QH) coronal mass ejections (CMEs) are identified, of which 121 are from solar cycle (SC) 23 and 21 from SC 24.
Journal ArticleDOI
Acceleration phases of a solar filament during its eruption
TL;DR: Zhang et al. as mentioned in this paper investigated the role of resistive magnetic reconnection and the ideal instability of magnetic flux rope in CMEs and found that both processes have a comparable contribution to accelerate the filament in this event.
Journal ArticleDOI
Manifestations of three dimensional magnetic reconnection in an eruption of a quiescent filament: \\ Filament strands turning to flare loops
TL;DR: In this paper, the authors report on observations of conversion of bright filament strands into flare loops during 2012 August 31 filament eruption, which is not included in the standard flare model (CSHKP), as it does not address footpoints of erupting flux ropes and ribbon hooks.
Journal ArticleDOI
Variation of Magnetic Flux Ropes through Major Solar Flares
TL;DR: In this article, the authors studied the variation of coronal magnetic fields, focusing on magnetic flux ropes (MFRs), through major flares including 29 eruptive and 16 confined events, and found that nearly 90% events possess MFR before flare and 70% have MFR even after flare.
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