Speaker
Description
First Name: Vasantharaju
Last Name: Naganna
Affiliation: Max Planck Institute for Solar System Research
All Authors: N. Vasantharaju, H. Peter, L. P. Chitta, S. Mandal
Abstract: We report a prominent jet-like solar feature exhibiting signatures of magnetic braiding as originally proposed by Parker. Unlike typical jets, the feature shows an elongated, loop-aligned brightening and apparent untwisting of braided strands without strong collimated outflows. We analyze this event using coordinated observations from Solar Orbiter, IRIS, and SDO. The brightened structure originates from a unipolar positive magnetic region showing no flux cancellation within the HMI resolution limit. Slow horizontal motions of strong positive flux elements (≥100 G) braid the magnetic field lines, leading to magnetic stress buildup. The subsequent untwisting appears to result from reconnection-driven relaxation of the braided field. The estimated Poynting flux indicates a substantial localized energy transfer to the upper atmosphere. Co-aligned imaging with IRIS SJI 1400 Å and EUI/HRI 174 Å reveals cool transition-region and hot coronal plasma side by side, with cool plasma enveloping hotter strands - an uncommon configuration. Light curves and space-time plots demonstrate temperature-dependent cooling, with plasma cooling faster in the transition region than in coronal layers. These observations present one of the rare compelling examples of the release of stored magnetic energy through reconnection and relaxation of braided field lines in the corona.