TY - JOUR
T1 - Discovery of Spatial Periodicities in a Coronal Loop Using Automated Edge-Tracking Algorithms
AU - Jess, David
AU - Mathioudakis, Mihalis
AU - Erdélyi, Robert
AU - Verth, Gary
AU - McAteer, James
AU - Keenan, Francis
PY - 2008/6
Y1 - 2008/6
N2 - A new method for automated coronal loop tracking, in both spatial and temporal domains, is presented. Applying this technique to TRACE data, obtained using the 171 Å filter on 1998 July 14, we detect a coronal loop undergoing a 270 s kink-mode oscillation, as previously found by Aschwanden et al. However, we also detect flare-induced, and previously unnoticed, spatial periodicities on a scale of 3500 km, which occur along the coronal loop edge. Furthermore, we establish a reduction in oscillatory power for these spatial periodicities of 45% over a 222 s interval. We relate the reduction in detected oscillatory power to the physical damping of these loop-top oscillations.
AB - A new method for automated coronal loop tracking, in both spatial and temporal domains, is presented. Applying this technique to TRACE data, obtained using the 171 Å filter on 1998 July 14, we detect a coronal loop undergoing a 270 s kink-mode oscillation, as previously found by Aschwanden et al. However, we also detect flare-induced, and previously unnoticed, spatial periodicities on a scale of 3500 km, which occur along the coronal loop edge. Furthermore, we establish a reduction in oscillatory power for these spatial periodicities of 45% over a 222 s interval. We relate the reduction in detected oscillatory power to the physical damping of these loop-top oscillations.
U2 - 10.1086/587735
DO - 10.1086/587735
M3 - Article
SN - 0004-637X
SN - 1538-4357
SN - 2041-8205
SN - 2041-8213
VL - 680
SP - 1523
EP - 1531
JO - The Astrophysical Journal
JF - The Astrophysical Journal
IS - 2
ER -