Abstracts Details


First Name * : Aabha
Last Name * : Monga
Affiliation * : Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital
Abstract Type * : Poster
Title * : On the partial eruption of a bifurcated solar filament structure
Author(s) * : Aabha Monga, Rahul Sharma, Jiajia Liu, Consuelo Cid, Wahab Uddin, Ramesh Chandra, Robertus Erdélyi
Abstract Session * : Solar flares and coronal mass ejections
Abstract * : The partial eruption of a filament channel with bifurcated substructures is investigated using datasets obtained from both ground based and space-borne facilities. Small-scale flux cancellation events in the region resulted into the pile-up of ambient magnetic field in close proximity of the filament channel. This led to the interaction/reconnection between the flux pile-up and the filament channel, with the presence of a V-shaped cusp and associated plasmoid structures at the site of interaction. Analysis of imaging data from SDO/AIA further suggests the vertical splitting of the filament structure into two substructures. The perturbed upper branch of the filament structure rose up and merged with an overlying flux rope feature, before the onset of an energetic GOES M1.4 flare at 04:30 UT on January 28, 2015. The estimated twist parameter from nonlinear force free-field extrapolation of the magnetic field data indicates continuous unwrithe of the flux systems, before the partial eruption of the merged structures. Our study suggests the loss in equilibrium of the upper branch due to torus instability, implying this as a potential triggering mechanism.