000007165 001__ 7165
000007165 005__ 20250102103557.0
000007165 037__ $$aSCART-2025-0002
000007165 100__ $$aShrivastav, Arpit Kumar
000007165 245__ $$aOn the Existence of Long-Period Decayless Oscillations in Short Active Region Loops
000007165 260__ $$c2024
000007165 520__ $$aDecayless kink oscillations, characterized by their lack of decay in amplitude, have been detected in coronal loops of varying scales in active regions, quiet Sun and coronal holes. Short-period (< 50 s) decayless oscillations have been detected in short loops (< 50 Mm) within active regions. Never- theless, long-period decayless oscillations in these loops remain relatively unexplored and crucial for understanding the wave modes and excitation mechanisms of decayless oscillations. We present the statistical analysis of decayless oscillations from two active regions observed by the Extreme Ultraviolet Imager (EUI) onboard Solar Orbiter. The average loop length and period of the detected oscillations are 19 Mm and 151 seconds, respectively. We find 82 long-period and 23 short-period oscillations in these loops. We do not obtain a significant correlation between loop length and period. We discuss the possibility of different wave modes in short loops, although standing waves can not be excluded from possible wave modes. Furthermore, a different branch exists for active region short loops in the loop length vs period relation, similar to decayless waves in short loops in quiet Sun and coronal holes. The magnetic fields derived from MHD seismology, based on standing kink modes, show lower values for multiple oscillations compared to previous estimates for long loops in active regions. Additionally, the comparison of period distributions in short loops across different coronal regions indicates that different excitation mechanisms may trigger short-period kink oscillations in active regions compared to the quiet Sun and coronal holes.
000007165 594__ $$aSTCE
000007165 700__ $$aPant, Vaibhav 
000007165 700__ $$aKumar, Rohan
000007165 700__ $$aBerghmans, David
000007165 700__ $$aVan Doorsselaere, Tom
000007165 700__ $$aBanerjee, Dipankar
000007165 700__ $$aPetrova, Elena
000007165 700__ $$aLim, Daye
000007165 773__ $$pApJ$$y2024
000007165 8560_ $$fdavid.berghmans@ksb-orb.be
000007165 85642 $$ahttps://arxiv.org/pdf/2411.15646
000007165 905__ $$aaccepted to be published in
000007165 980__ $$aREFERD