EDP Sciences
Free Access
Issue
A&A
Volume 394, Number 3, November II 2002
Page(s) L39 - L42
Section Letters
DOI https://doi.org/10.1051/0004-6361:20021378
Published online 21 October 2002


A&A 394, L39-L42 (2002)
DOI: 10.1051/0004-6361:20021378

Letter

Coronal loop oscillations

An interpretation in terms of resonant absorption of quasi-mode kink oscillations
M. Goossens1, J. Andries1 and M. J. Aschwanden2

1  Centre for Plasma Astrophysics, K. U. Leuven, Celestijnenlaan 200B, 3001 Leuven, Belgium
2  Lockheed Martin Advanced Technology Center, Solar and Astrophysics Lab., Hanover Street, Palo Alto, CA 94304, USA

(Received 21 August 2002 / Accepted 19 September 2002)

Abstract
Damped quasi-mode kink oscillations in cylindrical flux tubes are capable of explaining the observed rapid damping of the coronal loop oscillations when the ratio of the inhomogeneity length scale to the radius of the loop is allowed to vary from loop to loop, without the need to invoke anomalously low Reynolds numbers. The theoretical expressions for the decay time by Hollweg & Yang (1998) and Ruderman & Roberts (2002) are used to estimate the ratio of the length scale of inhomogeneity compared to the loop radius for a collection of loop oscillations.


Key words: Sun: corona -- magnetic fields -- oscillations

Offprint request: J. Andries, jesse.andries@wis.kuleuven.ac.be




© ESO 2002

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.