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Solar Physics

, Volume 175, Issue 2, pp 411–436 | Cite as

Eruptive prominence and associated CME observed with SUMER, CDS and LASCO (SOHO)

  • J. E. Wiik
  • B. Schmieder
  • T. Kucera
  • A. Poland
  • P. Brekke
  • G. Simnett
Article

Abstract

Observations of an eruptive prominence were obtained on 1 May 1996, with the SUMER and CDS instruments aboard SOHO during the preparatory phase of the Joint Observing Programme JOP12. A coronal mass ejection observed with LASCO is associated temporally and spatially with this prominence. The main objective of JOP12 is to study the dynamics of prominences and the prominence–corona interface. By analysing the spectra of Oiv and Siiv lines observed with SUMER and the spectra of 15 lines with CDS, Doppler shifts, temperatures and electron densities (ratio of Oiv 1401 to 1399Å) were derived in different structures of the prominence. The eruptive part of the prominence consists of a bubble (plasmoid) of material already at transition region temperatures with red shifts up to 100 km s-1 and an electron density of the order of 1010cm-3. The whole prominence was very active. It developed both a large helical loop and several smaller loops consisting of twisted threads or multiple ropes. These may be studied in the SUMER movie (movie 2). The profiles of the SUMER lines show a large dispersion of velocities (±50 km s-1) and the ratio of the Oiv lines indicates a large dispersion in electron density (3 x 109cm-3 to 3x 1011cm-3). The CME observed by LASCO left the corona some tens of minutes before the prominence erupted. This is evidence that the prominence eruptions are probably the result of the removal of the restraining coronal magnetic fields which are in part responsible for the original stability of the prominence.

Keywords

Magnetic Field Region Temperature Transition Region Coronal Mass Ejection Doppler Shift 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • J. E. Wiik
    • 1
    • 2
  • B. Schmieder
    • 1
    • 3
  • T. Kucera
    • 4
    • 5
  • A. Poland
    • 5
  • P. Brekke
    • 1
  • G. Simnett
    • 6
  1. 1.ItaOsloNorway
  2. 2.Observatoire de la Côte d'AzurNice Cedex 04France
  3. 3.Observatoire de Meudon, DASOPMeudon CedexFrance
  4. 4.Applied Research CorporationLandoverU.S.A
  5. 5.Nasa/gsfc, Code 682GreenbeltU.S.A
  6. 6.University of BirminghamBirminghamU.K

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