Characteristics of transverse oscillations in a coronal loop arcade

Details Characteristics of transverse oscillations in a coronal loop arcade Characteristics of transverse oscillations in a coronal loop arcade

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004soph..223...77v&link_type=abstract

Solar Physics, Volume 223, Issue 1-2, pp. 77-94

Physics

124

Scientific paper

TRACE observations from 15 April 2001 of transverse oscillations in coronal loops of a post-flare loop arcade are investigated. They are considered to be standing fast kink oscillations. Oscillation signatures such as displacement amplitude, period, phase and damping time are deduced from 9 loops as a function of distance along the loop length. Multiple oscillation modes are found with different amplitude profile along the loop length, suggesting the presence of a second harmonic. The damping times are consistent with the hypothesis of phase mixing and resonant absorption, although there is a clear bias towards longer damping times compared with previous studies. The coronal magnetic field strength and coronal shear viscosity in the loop arcade are derived.

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