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Jovian Dust Bursts

  • H. A. Zook (a1), E. Grün (a2), M. Baguhl (a2), D. Hamilton (a2), G. Linkert (a2), J.-C. Liou (a1), R. Forsyth (a3) and J. L. Phillips (a4)...

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Six streams of dust were unexpectedly detected by the Ulysses dust detector while this spacecraft was approximately within one AU distance from Jupiter (Grün et al., 1993). Stream durations ranged from hours to days for individual streams. It was clear that the dust in these streams (or bursts), from their directionality of approach to the spacecraft and from the nearness of stream occurrences to Jupiter, emanated from the Jovian system.

Following the original report, Baguhl et al. (1994) later relaxed the criteria for differentiating true dust impacts from “noise pulses” and found almost triple the number of dust impacts in the six streams already found. They also found 5 more streams that, except for one stream, clearly emanated from the Jovian system. The criteria were relaxed in such a way as to not introduce “noise events” into the data.

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References

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Grün, E., Zook, H.A., Baguhl, M., Balogh, A., Bame, S.J., Fechtig, H., Forsyth, R., Hanner, M.S., Horanyi, M., Kissel, J., Lindblad, B.-A., Linkert, D., Linkert, G., Mann, I., McDonnell, J.A.M., Morfill, G.E., Phillips, J.L., Polanskey, C., Schwehm, G., Siddique, N., Staubach, P., Svestka, J., and Taylor, A. 1993, Discovery of jovian dust streams and interstellar grains by the Ulysses spacecraft. Nature 362, 428430.
Baguhl, M., Grün, E., Linkert, G., Linkert, D., and Siddique, N. 1994, Identification of “small” dust impacts in the Ulysses dust detector data. Planet. Space Sci., 41, 10851098.

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