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ULYSSES at high latitudes: an overview of recent results

Smith, E. J.; Marsden, R. G.

After its fly-by of the planet Jupiter in February 1992, the Ulysses spacecraft is now in a highly inclined heliocentric orbit that will bring it above the south polar regions of the Sun in September 1994. The high-latitude phenomena observed to date have been strongly influenced by the near-minimum solar activity conditions encountered during thi…

ULYSSES observations of double ion beams associated with coronal mass ejections

Balogh, A.; Phillips, J. L.; Feldman, W. C. +1 more

Coronal mass ejections (CME's) are thought to result from the loss of stability within a magnetically confined coronal structure leading to its radial expansion into interplanetary space. As the CME expands into the corona current sheets will form between the expanding CME and surrounding field lines in the ambient wind. This configuration may lea…

Taurid complex meteoroids detected near aphelion with ULYSSES

Grün, E.; McDonnell, J. A. M.; Taylor, A. D.

Between 3.4 and 4.0 AU the dust detection system aboard the Ulysses spacecraft showed an increase in detection rate for particles with masses greater than 5 x 10^-13 g. The spacecraft meteoroid encounter geometry indicates highly eccentric orbits detected near aphelion. The outer limit of the enhanced flux is imposed as meteoroids on such orbits m…

Coronal transport and storage of energetic particles

Simnett, G. M.

There is increasing evidence that regions of the corona or the inner heliosphere sometimes impede the escape of energetic particles accelerated at the Sun. Certain impulsive radio, X- and gamma-ray emissions indicate times at which major particle acceleration has recently occurred. The more gradual emissions are harder to interpret, and may reflec…

Interplanetary magnetic field control of heavy ion abundances at ~ 5.2 AU

Forsyth, R. J.; Lanzerotti, L. J.; Maclennan, C. G.

The HI-SCALE instrument on the Ulysses spacecraft measured a long-lasting heavy ion particle event from about day 304 to day 318, 1992, at a southern heliographic latitude of ~20 deg. An analysis is presented of the relative (to O) C and Fe abundance variations during this interval. The variations are associated with major interplanetary magnetic …