SUMER/SOHO Observations of Long Period Oscillations in an Active Region Filament
Title | SUMER/SOHO Observations of Long Period Oscillations in an Active Region Filament |
Publication Type | Conference Paper |
Year of Publication | 2001 |
Authors | Régnier, S., Solomon J., and Vial J. C. |
Editor | Brekke, P., Fleck B., and Gurman J. B. |
Conference Name | Recent Insights into the Physics of the Sun and Heliosphere: Highlights from SOHO and Other Space Missions |
Abstract | During the MEDOC campaign #4 (October 1999), we observed an active region filament with the SUMER/SoHO spectrometer. After a global description of the active region NOAA 8725 with several instruments on board SoHO, we present a Fourier analysis of SUMER long time observations. This analysis allows to detect oscillations in several ranges of periodicities : 6-20 min, 30-40 min, and 55-150 min. We discuss these periodicities in terms of Alfvén and magnetoacoustic waves obtained in filament models developped by different authors. New MEDOC campaign (May 2000) coordinated with THEMIS (Tenerife) observatory should allow to examine the problem more closely. |
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