Title: Seismology of transversely oscillating coronal loops with siphon flows
Authors: Terradas, J ×
Arregui, I
Verth, G
Goossens, Marcel #
Issue Date: Mar-2011
Publisher: I O P Publishing Ltd.
Series Title: The Astrophysical Journal. Letters vol:729 issue:2 pages:-
Article number: L22
Abstract: There are ubiquitous flows observed in the solar atmosphere of sub-Alfvenic speeds; however, after flaring and coronal mass ejection events flows can become Alfvenic. In this Letter, we derive an expression for the standing kink mode frequency due to siphon flow in coronal loops, valid for both low and high speed regimes. It is found that siphon flow introduces a linear, spatially dependent phase shift along coronal loops and asymmetric eigenfunctions. We demonstrate how this theory can be used to determine the kink and flow speed of oscillating coronal loops with reference to an observational case study. It is shown that the presence of siphon flow can cause the underestimation of magnetic field strength in coronal loops using the traditional seismological methods.
ISSN: 2041-8205
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Plasma-astrophysics Section
× corresponding author
# (joint) last author

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