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MHD waves in active region filament from SOHO-THEMIS joint observations

TitleMHD waves in active region filament from SOHO-THEMIS joint observations
Publication TypeConference Paper
Year of Publication2002
AuthorsRégnier, S., Solomon J., Vial J. C., and Mein P.
EditorSawaya-Lacoste, H.
Conference NameSOLMAG 2002. Proceedings of the Magnetic Coupling of the Solar Atmosphere Euroconference
Date PublishedOct
Abstract

The stability of solar filaments and their implications for eruptive events can be revealed by the existence of magnetohydrodynamic (MHD) waves. During the MEDOC campaign on May 2000, we performed joint observations involving SOHO and THEMIS instruments (CDS and MSDP respectively). We analyse the modes of oscillations for several spectral lines (Hα at 6563 Å, He I at 584 Å and Mg X at 609 Å): intermediate (6-40 min) and short (łt} 5 min) periods are found and are discusssed in terms of MHD waves. The Hα time series (MSDP) in both line center intensity and line-of-sight Doppler shifts provide constraints on models of filament oscillations.