Title: Coronal magnetic field measurement using loop oscillations observed by Hinode/EIS
Authors: Van Doorsselaere, T ×
Nakariakov, V. M
Young, P. R
Verwichte, E #
Issue Date: Aug-2008
Publisher: Springer-Verlag
Series Title: Astronomy & Astrophysics vol:487 issue:2 pages:L17-L20
Abstract: We report the first spectroscopic detection of a kink MHD oscillation of a solar coronal structure by the Extreme-Ultraviolet Imaging Spectrometer (EIS) on the Japanese Hinode satellite. The detected oscillation has an amplitude of 1 km s(-1) in the Doppler shift of the FeXII 195 angstrom spectral line (1.3 MK), and a period of 296 s. The unique combination of EIS's spectroscopic and imaging abilities enables us to measure simultaneously the mass density and length of the oscillating loop. This enables us to measure directly the magnitude of the local magnetic field, the fundamental coronal plasma parameter, as 39 +/- 8 G, with unprecedented accuracy. This proof of concept makes EIS an exclusive instrument for the full scale implementation of the MHD coronal seismological technique.
ISSN: 0004-6361
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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