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Science 19 May 1995:
Vol. 268. no. 5213, pp. 1030 - 1033
DOI: 10.1126/science.268.5213.1030
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Articles

Ulysses Solar Wind Plasma Observations at High Southerly Latitudes

J. L. Phillips 1, S. J. Bame 1, W. C. Feldman 1, J. T. Gosling 1, C. M. Hammond 1, D. J. McComas 1, B. E. Goldstein 2, M. Neugebauer 2, E. E. Scime 3, and S. T. Suess 4

1 Space and Atmospheric Sciences Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
2 Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA.
3 Department of Physics, West Virginia University, Morgantown, WV 26506, USA.
4 Space Science Laboratory/ES82, National Aeronautics and Space Administration Marshall Space Flight Center, Huntsville, AL 35812, USA.

Solar wind plasma observations made by the Ulysses spacecraft through –80.2° solar latitude and continuing equatorward to –40.1° are summarized. Recurrent high-speed streams and corotating interaction regions dominated at middle latitudes. The speed of the solar wind was typically 700 to 800 kilometers per second poleward of –35°. Corotating reverse shocks persisted farther south than did forward shocks because of the tilt of the heliomagnetic streamer belt. Sporadic coronal mass ejections were seen as far south as –60.5°. Proton temperature was higher and the electron strahl was broader at higher latitudes. The high-latitude wind contained compressional, pressure-balanced, and Alfvénic structures.

Submitted on January 31, 1995
Accepted on April 18, 1995


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