Discovery of Spatial Periodicities in a Coronal Loop Using Automated Edge-Tracking Algorithms

Jess, David, Mathioudakis, Mihalis, Erdélyi, Robert, Verth, Gary, McAteer, James and Keenan, Francis (2008) Discovery of Spatial Periodicities in a Coronal Loop Using Automated Edge-Tracking Algorithms. The Astrophysical Journal, 680 (2). pp. 1523-1531. ISSN 0004-637X

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Official URL: http://dx.doi.org/10.1086/587735

Abstract

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.

Item Type: Article
Subjects: F300 Physics
F500 Astronomy
Department: Faculties > Engineering and Environment > Mathematics and Information Sciences
Depositing User: EPrint Services
Date Deposited: 19 Apr 2011 09:16
Last Modified: 08 May 2017 12:14
URI: http://nrl.northumbria.ac.uk/id/eprint/1575

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