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Session 49 - First Results from the Solar and Heliospheric Observatory (SOHO).
Oral session, Tuesday, June 11
Wisconsin Center,

[49.06] First Results from the SOHO Ultraviolet Coronagraph Spectrometer

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

The SOHO Ultraviolet Coronagraph Spectrometer (UVCS/SOHO) is being used to observe the extended solar corona from 1.25 to 10 R_\sun from Sun center. Initial observations of polar coronal holes, polar plumes, equatorial streamers and the diffuse mid-latitude corona will be presented. The observations include measurements of spectral line profiles for HI Lyman alpha and beta, and O VI 103.2 and 103.7 nm. Line intensities for Mg X 61.0 nm, Si XII 49.9 and 52.0 nm, S X 119.6 nm, Fe XII 124.2 nm and several other minor ions have been observed. Observations with moderate time resolution (about 1 minute) at one strip of the corona will also be presented. Preliminary results for derived proton and O VI velocity distributions and initial indications of outflow velocities for protons, and O VI will be discussed as well as preliminary results for other spectroscopic diagnostics techniques. This research is supported by NASA Contract NAS5-31250 to the Smithsonian Astrophysical Observatory, by the Italian Space Agency and by Switzerland.

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