Ulysses-UVCS Coordinated Observations |
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| Authors: | S T Suess G Poletto G Corti G Simnett G Noci M Romoli J Kohl B Goldstein |
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| Institution: | (1) NASA Marshall Space Flight Center, Huntsville, AL, USA;(2) Osservatorio Astrofisico di Arcetri, Firenze, Italy;(3) University of Birmingham, United Kingdom;(4) Universitá di Firenze, Italy;(5) Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA;(6) Jet Propulsion Laboratory, Pasadena, CA, USA |
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| Abstract: | We present results from SOHO/UVCS measurements of the density and flow speed of plasma at the Sun and again of the same plasma
by Ulysses/SWOOPS in the solar wind. UVCS made measurements at 3.5 and 4.5 solar radii and Ulysses was at 5.1 AU. Data were
taken for nearly 2 weeks in May–June 1997 at 9–10 degrees north of the equator in the streamer belt on the east limb. Density
and flow speed were compared to see if near Sun characteristics are preserved in the interplanetary medium. By chance, Ulysses
was at the very northern edge of the streamer belt. Nevertheless, no evidence was found of fast wind or mixing of slow wind
with fast wind coming from the northern polar coronal hole. The morphology of the streamer belt was similar at the beginning
and end of the observing period, but was markedly different during the middle of the period. A corresponding change in density
(but not flow speed) was noted at Ulysses.
This revised version was published online in June 2006 with corrections to the Cover Date. |
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| Keywords: | SOHO Ulysses streamers |
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