English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We analyze the characteristics of a quiescent polar prominence using theAtmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory(SDO). Initially, small-scale barb-like structures are evident on the solardisk, which firstly grow vertically and thereafter move towards the south-westlimb. Later, a spine connects these barbs and we observe apparent rotatingmotions in the upper part of the prominence. These apparent rotating motionsmight play an important role for the evolution and growth of the filament bytransferring cool plasma and magnetic twist. The large-scale vortex motion isevident in the upper part of the prominence, and consists of a swirl-likestructure within it. The slow motion of the footpoint twists the legs of theprominence due to magnetic shear, causing two different kinds of magneticreconnection. The internal reconnection is initiated by a resistivetearing-mode instability, which leads to the formation of multiple plasmoids inthe elongated current sheet. The estimated growth rate was found to be0.02--0.05. The magnetic reconnection heats the current sheet for a smallduration. However, most of the energy release due to magnetic reconnection isabsorbed by the surrounding cool and dense plasma and used to accelerate theplasmoid ejection. The multiple plasmoid ejections destroy the current sheet.Therefore, the magnetic arcades collapse near the X-point. Oppositely directedmagnetic arcades may reconnect with the southern segment of the prominence andan elongated thin current sheet is formed. This external reconnection drivesprominence eruption.

Large-Scale Vortex Motion and Multiple Plasmoid Ejection Due to Twisting Prominence Threads and Associated Reconnection