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

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

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.505..647r&link_type=abstract

In: SOLMAG 2002. Proceedings of the Magnetic Coupling of the Solar Atmosphere Euroconference and IAU Colloquium 188, 11 - 15 Jun

Physics

Sun: Oscillations, Sun: Mhd Waves, Sun: Filament

Scientific paper

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 (< 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.

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