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Ulysses solar wind plasma observations from pole to pole
McComas, D. J.; Goldstein, B. E.; Bame, S. J. +8 more
We present Ulysses solar wind plasma data from the peak southerly latitude of -80.2° on 12 September 1994 through the corresponding northerly latitude on 31 July 1995. Ulysses encountered fast wind throughout this time except for a 43° band centered on the solar equator. Median mass flux was nearly constant with latitude, while speed and density h…
Three-dimensional magnetic reconnection and the magnetic topology of coronal mass ejection events
Hesse, M.; Gosling, J. T.; Birn, J.
Measurements of suprathermal electron fluxes in the solar wind indicate that field lines within coronal mass ejections, CMEs, near and beyond 1 AU are normally connected to the Sun at both ends. However, on occasion some field lines embedded deep within CMEs appear to be connected to the Sun at only one end. Here we propose an explanation for how …
Ulysses observations of the radial magnetic field
Balogh, A.; Smith, Edward J.
The radial component of the magnetic field in the southern hemisphere has been measured at Ulysses as it traveled from the equator to -80.2° latitude and returned. The radial component multiplied by the square of the radial distance, i.e., BRr2, averaged over 77 day intervals (three solar rotations) is approximately constant …
Ulysses observations of Alfvén waves in the southern and northern solar hemispheres
Balogh, A.; Smith, E. J.; Neugebauer, M. +1 more
Alfvén waves with periods from <1 to >10 hours are shown to be continuously present in the sun's south and north polar regions. Below ≈ 30° latitude, as revealed by the rapid traversal of the equatorial region by Ulysses, the wave power averaged over a solar rotation decreases abruptly. The correlations between magnetic field and solar wind …
Properties of magnetohydrodynamic turbulence in the solar wind as observed by Ulysses at high heliographic latitudes
Balogh, A.; Horbury, T. S.; Smith, E. J. +3 more
The Ulysses mission provides an opportunity to study the evolution of magnetohydrodynamic (MHD) turbulence in pure high-speed solar wind streams. The absence at high heliocentric latitudes of the strong shears in solar wind velocity generally present near the heliocentric current sheet allows investigation of how fluctuations in the magnetic field…
Weak pitch angle scattering of few MV rigidity ions from measurements of anisotropies in the distribution function of interstellar pickup H+
Geiss, J.; Schwadron, N. A.; Gloeckler, G. +1 more
The distribution function of interstellar pickup hydrogen is measured with the SWICS instrument on Ulysses at high heliographic latitudes, over a broad range of velocities, including those below that of the solar wind. It is found that these few MV rigidity protons exhibit a pronounced inward radial streaming in the frame of the solar wind, sugges…
Interpretation and consequences of large-scale magnetic variances observed at high heliographic latitude
Horbury, T. S.; Smith, E. J.; Giacalone, J. +2 more
We consider recent Ulysses observations of the large-scale variances in the transverse components of the interplanetary magnetic field. A previously-suggested theory is shown to provide a good fit to the observed spatial variation and level of the fluctuations. The transport of cosmic rays in the heliosphere will be significantly affected by these…
Large amplitude IMF fluctuations in corotating interaction regions: Ulysses at midlatitudes
Tsurutani, Bruce T.; Goldstein, Bruce E.; Balogh, Andre +2 more
Corotating Interaction Regions (CIRs), formed by high-speed corotating streams interacting with slow speed streams, have been examined from -20° to -36° heliolatitudes. The high-speed streams emanate from a polar coronal hole that Ulysses eventually becomes fully embedded in as it travels towards the south pole. We find that the trailing portion o…
A CME-driven solar wind disturbance observed at both low and high heliographic latitudes
McComas, D. J.; Forsyth, R. J.; Goldstein, B. E. +4 more
A solar wind disturbance produced by a fast coronal mass ejection, CME, that departed from the Sun on Feburary 20, 1994 was observed in the ecliptic plane at 1 AU by IMP 8 and at high heliographic latitudes at 3.53 AU by Ulysses. In the ecliptic the disturbance included a strong forward shock but no reverse shock, while at high latitudes the distu…
The band of solar wind variability at low heliographic latitudes near solar activity minimum: Plasma results from the Ulysses rapid latitude scan
McComas, D. J.; Bame, S. J.; Neugebauer, M. +7 more
Near solar activity minimum large variations in the quiescent solar wind flow are confined to a narrow latitude band centered near the heliographic equator. During Ulysses' recent rapid latitude scan this band was ∼43° wide. Flow parameters poleward of the band in the opposite solar hemispheres were nearly the same. Main entry into the band of var…