The Jovian dust streams are high-speed bursts of submicron-sized particles
traveling in the same direction from a source in the Jovian system. Since their
discovery in 1992, they have been observed by three spacecraft: Ulysses,
Galileo and Cassini. The source of the Jovian dust streams is dust from Io's
volcanoes. The charged and traveling dust stream particles have particular
signatures in frequency space and in real space. The frequency-transformed
Galileo dust stream measurements show different signatures, varying
orbit-to-orbit during Galileo's first 29 orbits around Jupiter. Time-frequency
analysis demonstrates that Io is a localized source of charged dust particles.
Aspects of the particles' dynamics can be seen in the December-2000 joint
Galileo-Cassini dust stream measurements. To match the travel times, the
smallest dust particles could have the following range of parameters: radius:
6nm, density: 1.35-1.75gr/cm3, sulfur charging conditions, which produce
dust stream speeds: 220|450km/sec (Galileo|Cassini) and charge potentials:
5.5|6.3Volt (Galileo|Cassini).Comment: 8 pages, 5 postscript figures, latex, uses esapub.cls, aa.bst.
Version with high-resolution figures can be found at
http://www.mpi-hd.mpg.de/dustgroup/~graps/thesis
