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Low-frequency limit of Jovian radio emissions and implications on source locations and Io plasma wake

Zarka, Philippe; Crary, Frank J.; Queinnec, Julien

After deriving from Ulysses-URAP measurements the low-frequency limit of the Jovian hectometer emission spectrum ( 250±50 kHz at the -20 dB level below the emission peak), and confirming the absence of Io's control on Jovian radio emission below ∼1 MHz, we propose a single common explanation for these low-frequency limits: both are well explained …

Four years of Ulysses dust data: 1996-1999

Krüger, H.; Srama, R.; Hamilton, D. P. +17 more

The Ulysses spacecraft is orbiting the Sun on a highly inclined ellipse ( i=79°, perihelion distance 1.3 AU, aphelion distance 5.4 AU). Between January 1996 and December 1999 the spacecraft was beyond 3 AU from the Sun and crossed the ecliptic plane at aphelion in May 1998. In this 4-yr period 218 dust impacts were recorded with the dust detector …

Local time asymmetry of the equatorial current sheet in Jupiter's magnetosphere

Cowley, S. W. H.; Bunce, E. J.

We provide a first systematic comparison of the radial fields associated with the equatorial current sheet in the Jovian magnetosphere which were observed during the flybys of the Pioneer-10 and -11, Voyager-1 and -2, and Ulysses spacecraft. These data span a ∼210° range of azimuths about the planet, from dusk via noon to the post-midnight sector.…

Periodic signals in Ulysses' energetic particle events upstream and downstream from the Jovian bow shock

Sarris, E. T.; Anagnostopoulos, G. C.; Marhavilas, P. K.

We present results from a statistical analysis of energetic particle events, observed by the Heliosphere instrument for spectra, composition, and anisotrophy at low energies (HI-SCALE) instrument onboard Ulysses, upstream from the bow shock of Jupiter, during the inbound and outbound trajectory of the spacecraft. A harmonic analysis on the intensi…

Large-scale energetic particle layers in the high latitude Jovian magnetosphere

Anagnostopoulos, G. C.; Karanikola, I.; Marhavilas, P.

This study presents an analysis of long lasting (∼2- 3 h) energetic (≳60 keV) ion and (≳40 keV) electron events observed by the HISCALE instrumentation on board Ulysses in the high latitude Jovian magnetosphere. The high latitude events in the prenoon dayside (d 36-38, 1992) and the south duskside (d 40-43, 1992) magnetosphere are different from t…

The Jovian HOM and bKOM radio emissions observed by Wind//WAVES and by Ulysses//URAP

MacDowall, R. J.; Kaiser, M. L.; Lecacheux, A. +1 more

During 1995 and into 1996, both the Jovian hectometric radio emission (HOM) and the Jovian broadband radio emission (bKOM) were received occasionally by the Radio and Plasma Wave Investigation (WAVES) on board the Wind spacecraft and by the Unified Radio and Plasma Experiment (URAP) on board the Ulysses spacecraft. Ulysses was then at distances of…