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URN: urn:nbn:de:bsz:16-opus-18384
URL: http://www.ub.uni-heidelberg.de/archiv/1838
Hinweis zum Urheberrecht.
Io Revealed in the Jovian Dust Streams
Ios 'Fußabdruck' in den Staubströmen des Jupiter
pdf-Format:
Dokument 1.pdf (30.900 KB)
SWD-Schlagwörter:
Die Staubströme des Jupiter , Zeit-Frequenzanalyse , Vulkane Ios
Freie Schlagwörter (Englisch):
Jovian dust streams , time-frequency analysis , Io's volcanoes
PACS - Klassifikation:
96.50.Dj
Institut:
MPI fuer Kernphysik
Fakultät:
Zentrale und Sonstige Einrichtungen
DDC-Sachgruppe:
Physik
Dokumentart:
Dissertation
Hauptberichter:
Grün, Eberhard (Prof. Dr.)
Sprache:
Englisch
Tag der mündlichen Prüfung:
18.07.2001
Erstellungsjahr:
2001
Publikationsdatum:
15.01.2002
Kurzfassung in Deutsch:
Kurzfassung in Englisch:
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).
