Observation of Jupiter's Polar Cusps

Details Observation of Jupiter's Polar Cusps Observation of Jupiter's Polar Cusps

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003dps....35.4029p&link_type=abstract

American Astronomical Society, DPS meeting #35, #40.29; Bulletin of the American Astronomical Society, Vol. 35, p.1488

Astronomy and Astrophysics

Astronomy

Scientific paper

Global analysis of the HST-STIS data from Jovian auroral observations has revealed the presence of a southern equivalent of the northern transient feature known as the northern polar cusp or as an 'auroral flare'. The features are both located near the open/closed field line boundary, and their longitude follows a constant-magnetic-time profile, near noon, while Jupiter rotates. The spot brightness also varies consistently in both hemispheres. We suggest that these spots are indeed at the footprint of the Jovian polar cusps, and that their brightenings are indicative of transient reconnection processes with the interplanetary magnetic field (IMF). A STIS spectrum reveals very penetrating primary particles, up to 200 keV ?equivalent electron energy', or significantly uplifted hydrocarbon layers.

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