Physical Properties of a Coronal Streamer at 2.5 Solar Radii

Details Physical Properties of a Coronal Streamer at 2.5 Solar Radii Physical Properties of a Coronal Streamer at 2.5 Solar Radii

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsh51b..03u&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SH51B-03

Physics

7509 Corona

Scientific paper

In this presentation the plasma properties of a streamer observed in April of 2007 at 2.5 solar radii are examined. The data comes from observations conducted by the Ultraviolet Coronagraph Spectrometer (UVCS) and the Large Angle Spectroscopic Coronagraph (LASCO) C2 instrument aboard the Solar and Heliospheric Observatory (SOHO). From the UV spectral profiles the proton and oxygen kinetic temperatures can be derived as a function of latitude across the streamer. The observed line intensities are used to calculate the photospheric normalized absolute elemental abundances for O, S, N and Fe. The abundances are analyzed with respect to the FIP effect and compared to in situ measurements at SOHO. An estimate for the electron density is determined from both the UV data and the polarized white light data from LASCO C2.

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