Solar wind magnetic field bending of jovian dust trajectories

From September 1991 to October 1992, the cosmic dust detector on the Ulysses spacecraft recorded 11 short bursts, or streams, of dust. These dust grains emanated from the jovian system, and their trajectories were strongly affected by solar wind magnetic field forces. Analyses of the on-board measurements of these fields, and of stream approach directions, show that stream-associated dust grain masses are of the order of [10.sup.-18] gram and dust grain velocities exceed 200 kilometers per second. These masses and velocities are, respectively, about [10.sup.3] times less massive and 5 to 10 times faster than earlier reported.
While the Ulysses spacecraft was in the neighborhood of Jupiter, the on-board cosmic dust detector (CDD) detected 11 intense, and unexpected, streams of dust (1-3). The first stream occurred 2359 [...]