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Radial evolution of ejecta characteristics and transient shocks: Ulysses in-ecliptic observations
Smith, E. J.; Neugebauer, M.; Phillips, J. L. +1 more
During its travel to Jupiter, Ulysses detected 25 ejecta and 32 transient forward shocks (TFS), and in the first 3 months after the Jupiter flyby Ulysses detected 9 ejecta and 5 TFS. Half of these ejecta (17) were associated with TFS. We identified the ejecta using bidirectional streaming of suprathermal electrons accompanied by other plasma cloud…
Shape of the heliospheric termination shock: Effects of latitude variations of solar wind dynamic pressure
Barnes, Aaron
We investigate the consequences of internal solar wind latitude variations on the heliospheric termination shock and the flow of the gas beyond the shock. We have developed a simple gasdynamic model, assuming the solar wind to be a steady, axially symmetric radial outflow of gas that passes through a termination shock and flows incompressibly beyo…
On the differential ion velocity in the inner solar corona and the observed solar wind ionic charge states
Gloeckler, George; Geiss, Johannes; Ko, Yuan-Kuen
Theoretical calculations on multifluid solar wind have indicated that the velocities of ions of the same element are not the same in the inner coronal region where the freeze-in process of these solar wind heavy ions occurs. This may have nonnegligible effect on the inference of the electron temperature in this region from the observed ionic charg…
Impact of the Ulysses velocity on the diagnosis of the electron density by the Unified Radio and Plasma Wave sounder in the outskirts of the Io torus
Canu, Patrick; Cornilleau-Wehrlin, Nicole; Le Sager, Philippe
The resonance spectra collected on February 8, 1992, in the outskirts of the Io plasma torus by the Unified Radio and Plasma wave (URAP) relaxation sounder on board the Ulysses spacecraft present significant differences from the active spectra gathered by earthbound spacecraft in similar plasma conditions. The most striking anomaly is the lack of …
Lower bound for electron core beta in the solar wind
Goldstein, Bruce E.; Gary, S. Peter; Newbury, Jennifer A.
Solar wind electrons, especially under conditions of relatively low speed flow, often can be represented as two bi-Maxwellian components, a cooler, more dense core (denoted by the subscript c) and a hotter, more tenuous halo. Solar wind observations from Ulysses between 1.5 and 2 AU further indicate that the β for electron core temperatures parall…
Latitudinal structure within Jovian hectometric radiation
Higgins, Charles A.; Thieman, James R.; Fung, Shing F. +2 more
Jovian hectometric radio emission (HOM: 300-3000 kHz) has a number of persistent structural features associated with it as observed by the Voyager 1, Voyager 2, Ulysses, and Galileo spacecraft for specific jovigraphic latitudes (-4° to +7.1°) and local times (0.3 to 10.5 hours). Most notable are the presence of HOM emission between 270° and 120° c…
Jovian and terrestrial low-frequency radio bursts: Possible cause of anomalous continuum
Kaiser, M. L.
Observations by the Ulysses Unified Radio and Plasma Wave instrument show that the most intense portion of the Jovian continuum emission appears to emanate from the planet's bow shock or magnetosheath region. This intense component is highly correlated with the Jovian ``type III'' or quasi-periodic (QP-15 and QP-40) bursts. I suggest that this int…
Analysis of the waves associated with the unusual interplanetary shock observed on day 109, 1992
Balogh, A.; Lucek, E. A.
On day 109 of 1992 Ulysses observed an extraordinary interplanetary shock at a time of extremely unusual interplanetary magnetic field conditions. The field was closely aligned with the radial direction for nearly a day ahead of the shock, suggesting that it was most likely to be a quasi-parallel shock. Unlike most interplanetary shocks, this shoc…
Two spacecraft observations of transient shocks and ejecta in the interplanetary medium
González-Esparza, J. Américo; Bravo, Silvia
We compare Ulysses observations of 22 forward transient shocks (FTSs) and 11 ejecta during the first 19 months of its mission, with observations near Earth by IMP, in order to infer some properties of the propagation of these transient events in the interplanetary medium. We found that 13 of the 22 FTSs detected by Ulysses were also detected by IM…
Particle propagation channel detected at 4.7 AU inside a corotating interaction region
Pick, M.; Lanzerotti, L. J.; Sarris, E. T. +5 more
This study presents an interplanetary particle (electrons and ions) event which was detected at 4.7 AU by the instruments on the Ulysses spacecraft inside a corotating interaction region between a fast and slow solar wind stream. A particle propagation channel is identified where the particles can propagate from the Sun nearly scatter free within …