Jovian Dust Streams Measurements During Ulysses' 2004 Distant Jupiter Encounter

Details Jovian Dust Streams Measurements During Ulysses' 2004 Distant Jupiter Encounter Jovian Dust Streams Measurements During Ulysses' 2004 Distant Jupiter Encounter

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsh21b..05k&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #SH21B-05

Physics

6015 Dust

Scientific paper

Collimated burst-like streams of dust particles were discovered with Ulysses during approach to Jupiter in 1992 and later confirmed with Galileo and Cassini. The streams occurred at approximately monthly intervals (28 +- 3 days) which was explained by the particle interaction with the interplanetary magnetic field. Maximum impact rates were above 1000 per day, impact speeds exceeded 200 km/sec and grain radii were approximately 10 nm. Later Galileo measurements showed that the particles strongly interact with Jupiter's magnetosphere and that they originated from Io. More than ten years after their discovery, Ulysses measured the dust streams again during approach to Jupiter in 2003. Eight dust streams were detected by January 2004, confirming the grain properties, impact rates and monthly periodicity recognized in 1992. The measured impact directions are compatible with a grain origin from the jovian system, and the most distant stream recognized in the latest data occurred at 3.3 AU jovicentric distance. Taken all measurements together - the streams were detected at various jovigraphic latitudes between -35 deg and +75 deg.

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