Probing the twist angle of confined prominence eruption using SDO/AIA data

• DOI: 10.1088/1402-4896/ad59d3
• Publication Date: 2024-06-19T22:25:10Z
• Authors: Safinaz A Khaled; Abdelrazek M K Sh...; Ali G A Abdelkawy; A Hassanin; Mohamed A Semeida; Ahmed Ghitas
• Keywords: 0103 physical sciences; 01 natural sciences

Abstract In this context, we utilized a simplified representation of the curved cylinder flux tube to approximate helical structure prominence. By considering bright features as indicators magnetic field, measured average twist angle prominence legs. To gather necessary data, obtained image data with wavelength 171 Å from Solar Dynamic Observatory (SDO)/Advanced Imaging Assembly (AIA) archive. We employed some IDL routines within SolarSoft (SSW) package determine rope’s total for confined eruption. Specifically, focus on eruption that occurred at south-east limb Sun an active region (AR) NOAA (AR 11 117) observed October 21, 2010. The commenced 2010-10-21 21:56:18 UT and lasted until 2010-10-22 01:24:58 UT. During event, B2.6 flare class 23:17 UT, located heliographic position N20E84. Our results indicate distance between two footpoints is up 18 670 km. Initially, when event began height (h) was found be 21 162.1 km, but increased reach 80 362.4 km end ( ϕ , in radian) beginning = 13.4 π . As ascended higher levels, decreased gradually due field relaxation reached 3.6 determined ropes ) exceed threshold kink instability. Therefore, conclude caused by instability, result it consistent other investigations.