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Session 37 - First Results from the Solar and Heliospheric Observatory (SOHO).
Display session, Tuesday, June 11
Tripp Commons,

[37.04] Coordinated SOHO Observations of Polar Plumes: Ultraviolet Spectroscopy with UVCS

S. Fineschi (CfA), J. L. Kohl (CfA), G. Noci (U. of Florence), E. Antonucci (U. of Turin), G. Tondello (U. of Padua), M. C. E. Huber (ESA), L. D. Gardner (CfA), S. Giordano (U. of Turin), M. Romoli (U. of Florence), C. Benna (U. of Turin), A. Ciaravella (U. of Palermo), G. Naletto (U. of Padua), P. Nicolosi (U. of Padua), J. C. Raymond (CfA), O. H. W. Siegmund (UCB), D. Spadaro (OAC), P. L. Smith (CfA), L. Strachan (CfA)

The SOHO Ultraviolet Coronagraph Spectrometer (UVCS/SOHO) observed polar plumes at the south polar coronal hole on 7 March 1996. Observations were made in H I Ly-alpha, Ly-beta and O VI 103.2 and 103.7 nm. Heliocentric heights from 1.5 to 3.2 R_\sun were observed. In addition, HI Ly-alpha observations with 60 sec time resolution were obtained at a heliocentric height of 1.6 solar radii. The polar plumes are clearly distinguishable in both H I Ly-alpha and O VI. These measurements were made in coordination with time resolved magnetograms by the Michelson Doppler Imager (MDI) and time resolved XUV images by the Extreme-Ultraviolet Imaging Telescope (EIT). This work is supported by NASA Contract NAS5-31250 to the Smithsonian Astrophysical Observatory, by the Italian Space Agency and by Switzerland.

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