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Io Revealed in the Jovian Dust Streams

Graps, Amara Lynn

German Title: Ios 'Fußabdruck' in den Staubströmen des Jupiter

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Translation of abstract (English)

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: 6 nm, density: 1.35--1.75g/cm^3, sulfur charging conditions, which produce dust stream speeds: 220450 km/s (GalileoCassini) and charge potentials: 5.56.3V (GalileoCassini).

Item Type: Dissertation
Supervisor: Grün, Prof. Dr. Eberhard
Date of thesis defense: 18 July 2001
Date Deposited: 15 Jan 2002 00:00
Date: 2001
Faculties / Institutes: Service facilities > Max-Planck-Institute allgemein > MPI for Nuclear Physics
Subjects: 530 Physics
Controlled Keywords: Die Staubströme des Jupiter, Zeit-Frequenzanalyse, Vulkane Ios
Uncontrolled Keywords: Jovian dust streams , time-frequency analysis , Io's volcanoes
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