Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-26T04:52:54.519Z Has data issue: false hasContentIssue false
  • English
  • Français

SUMER/SOHO Observations of Long Period Oscillations in an Active Region Filament

Published online by Cambridge University Press:  13 May 2016

S. Régnier ,
J. Solomon  and
J. C. Vial
S. Régnier
Affiliation:
Institut d'Astrophysique Spatiale, Unité Mixte CNRS-Université Paris XI, Bâtiment 121, F-91405 Orsay Cedex, France
J. Solomon
Affiliation:
Institut d'Astrophysique Spatiale, Unité Mixte CNRS-Université Paris XI, Bâtiment 121, F-91405 Orsay Cedex, France
J. C. Vial
Affiliation:
Institut d'Astrophysique Spatiale, Unité Mixte CNRS-Université Paris XI, Bâtiment 121, F-91405 Orsay Cedex, France

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

During the MEDOC campaign #4 (October 1999), we observed an active region filament with the SUMER/SoHO spectrometer using the 584.33 Å HeI line. After a description of the HeI line profile in the filament, we present a Fourier analysis of SUMER long time observations. This analysis allows to detect oscillations in several ranges of periodicities: 6–20 min, 40–90 min. We discuss these periodicities in terms of Alfvén and magnetoacoustic waves obtained with a filament model developed by Joarder & Roberts (1993).

Type
Session III: Active Region Structure and Dynamics
Information
Symposium - International Astronomical Union , Volume 203: Recent Insights into the Physics of the Sun and Heliosphere: Highlights from Soho and Other Space Missions , 2001 , pp. 307 - 309
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

Chae, J., Schühle, U., Lemaire, P., 1998, ApJ, 505, 957.CrossRefGoogle Scholar
Joarder, P.S., Roberts, B., 1993, A&A, 277, 225.Google Scholar
Molowny-Horas, R., Oliver, R., Ballester, J.L., Baudin, F., 1997, Sol. Phys., 172, 181.CrossRefGoogle Scholar
Oliver, R., 1999, 9th European Meeting on Solar Physics, ESA-SP 448, p.425.Google Scholar
Wilhelm, K., et al., 1995, Sol. Phys., 162, 189.CrossRefGoogle Scholar