Ulysses Solar Wind Plasma Observations at High Southerly Latitudes
McComas, D. J.; Goldstein, B. E.; Bame, S. J.; Neugebauer, M.; Scime, E. E.; Phillips, J. L.; Gosling, J. T.; Feldman, W. C.; Suess, S. T.; Hammond, C. M.
United States
Abstract
Solar wind plasma observations made by the Ulysses spacecraft through -80.2^circ solar latitude and continuing equatorward to -40.1^circ 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^circ. 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^circ. Proton temperature was higher and the electron strahl was broader at higher latitudes. The high-latitude wind contained compressional, pressure-balanced, and Alfvenic structures.