Discovery of jovian dust streams and interstellar grains by the Ulysses spacecraft

Article Abstract:

Two types of dust particles were detected by the Ulysses spacecraft during its passage near Jupiter last Feb 8, 1992. The first type occured at periodic bursts and measured in the submicrometer range. The streams were narrow, collimated and concentrated near Jupiter. These grains are hypothesized to be of Jovian origin, which escaped Jupiter's influence by a combined action of the plantet's intense magnetic field and the high solar wind speed. The second type of dust particles were interstellar dust. This was indicated by the retrograde motion of the particles which moved at speeds comparable to interstellar gas.

Identification and classification, Space flight to Jupiter, Jupiter flights

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Constraints from Galileo observations on the origin of Jovian dust streams

Article Abstract:

The dust in the dust streams detected by the Galileo spacecraft near Jupiter originate from either the jovian gossamer ring or volcanoes on Io. The dust does not originate from the Shoemaker-Levy 9 comet as the comet has no stream activity. The dust storms detected by the Galileo dust detector are more intense and longer than those observed by the Ulysses spacecraft. The dust stream activity changes with time and there are significant differences between the intensity of the strongest and the weakest streams.

Galileo Project (Space probe)

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Mechanism for the acceleration and ejection of dust grains from Jupiter's magnetosphere

Article Abstract:

A model of the dust acceleration and ejection in Jupiter's magnetosphere has yielded mass and velocity ranges consistent with the findings of the Ulysses mission. The dust events observed by the said mission resulted from the actions of the jovial magnetospheree on dust particles. The model also showed that only particles in a given size range can acquire enough energy to be ejected from Jupiter's gravitational influence.

Research, Magnetosphere

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