Interplay between two filaments performs a key position in sympathetic filament eruptions

Photo voltaic sympathetic filament eruptions often contain two or extra filament eruptions that happen concurrently or successively inside a comparatively brief time interval with a sure causal linkage. The eruption of 1 filament might impact one other one, thus ensuing within the eruption of the opposite filament concurrently or successively.

Researchers led by Dr. Yang Liping and Prof. Yan Xiaoli from the Yunnan Observatories of the Chinese language Academy of Sciences have studied the interplay course of between two close by filaments within the lively area NOAA 12866 on September 9, 2021, utilizing knowledge from the 1-m New Vacuum Photo voltaic Telescope (NVST) and the Photo voltaic Dynamic Observatory (SDO).

The research was revealed in The Astrophysical Journal on Jan. 25.

They discovered that the precise a part of the bigger filament grew to become lively first and erupted after look of the brightening and bidirectional flows between the bigger filament and a close to smaller filament. Throughout its eruption course of, it constantly approached the smaller filament. Then they collided with one another, and the interplay occurred between them. Within the following, the brightening and bidirectional flows appeared between them.

“This means that magnetic reconnection occurred between the threads of two filaments,” stated Dr. Yang. The interplay resulted in a rightward movement of the smaller filament at first, after which its activation, and eventually part of it erupted. When the erupted smaller filament deflected quickly towards the center a part of the bigger filament, the left a part of the bigger filament erupted with its overlying magnetic fields disturbed by the smaller filament.

Moreover, the researchers discovered that the 2 filaments had reverse indicators of helicity, and after they collided with one another at a smaller contact angle of lower than 45°, the magnetic reconnection between them would occur.

“These successive eruptions occurred in a comparatively brief time with a sure causal linkage, and their eruptions have been attributable to filament interplay, which could be known as sympathetic eruptions,” stated Prof. Yan.

This research supplies new clues for understanding photo voltaic sympathetic eruptions and for learning the continual explosions of stars or different celestial our bodies.