Coordinated Prominence Observations by SOHO and Ground-Based Observatories

TitleCoordinated Prominence Observations by SOHO and Ground-Based Observatories
Publication TypeConference Paper
Year of Publication1999
AuthorsSchmieder, B., Heinzel P., Vial J.-C., Malherbe J. M., Mein P., Rudawy P., and Ceppatelli G.
EditorSchmieder, B., Hofmann A., and Staude J.
Conference NameThird Advances in Solar Physics Euroconference: Magnetic Fields and Oscillations
Date PublishedSep

Coordinated observations obtained during the JOP12 (Joint Observing Programme between SOHO and ground-based instruments) allow us to analyse the physical conditions in a prominence of 5 June 1997 and its environment in the solar corona. The arch-shaped prominence shows either vertical or horizontal structures according to the observed lines (Hα with the coronagraph of the Wroclaw University Observatory at Bialków and lines in a broad temperature range by the Coronal Diagnostic Spectrometer CDS). The less dynamic behaviour of this prominence was shown by the persistence of bubbles in the prominence and confirmed by the Dopplershifts measured in CDS lines and in Hα by the Italian Panoramic Monochromator (IPM) filter on the THEMIS telescope in Tenerife. We explain the complex morphology of this prominence by recent 3D MHD models. Finally, we present prominence spectra in higher lines of the hydrogen Lyman series (from Lδ to L-9), together with some other UV lines. These data have been obtained by the Solar Ultraviolet Measurements of Emitted Radiation (SUMER). We demonstrate the basic characteristics of the calibrated line profiles of Lyman lines and compare them with the theoretical profiles computed from isothermal-isobaric models. This leads to some constraints on the environment of the prominence.