Coordinated UVCS, CDS, TRACE Observations of a High Latitude Streamer

Details Coordinated UVCS, CDS, TRACE Observations of a High Latitude Streamer Coordinated UVCS, CDS, TRACE Observations of a High Latitude Streamer

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000eostr..81..353d&link_type=abstract

EOS Transactions, vol. 81, no. 19, 353

Astronomy and Astrophysics

Astrophysics

Scientific paper

We obtained coordinated UVCS/SOHO, CDS/SOHO and TRACE observations of a high latitude NE streamer during the first week of the Whole Sun Month III campaign (18-24 August 1999). The data cover the streamer, the streamer boundary and adjacent region at heights from 1 to 3.5 Rs. The streamer remained stable for five days but showed gradual shift towards lower latitudes. It originated above an active region with prominent magnetic loop structures recorded by TRACE. The active region was originally seen from behind the NE limb and then rotated onto the disk. We present our analysis of the UVCS/SOHO observations. We describe the distribution of the HI Lyman alpha, OVI(1032,1037 A) and MgX (625 A) emission as a function of both latitude and radius, and discuss the complex structure of the streamer. We apply our diagnostic techniques to characterize plasma properties like velocities along the line of sight or kinetic temperatures in the streamer and the adjacent region. Our results are further compared with CDS observations at the base of the streamer. This work was supported by NASA under Grant NAG5-3192 to the Smithsonian Astrophysical Observatory, by the Italian Space Agency, and by Swiss Funding Agencies.

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