UV Io footprint leading spot: A key feature for understanding the UV Io footprint multiplicity?

Details UV Io footprint leading spot: A key feature for understanding the UV Io footprint multiplicity? UV Io footprint leading spot: A key feature for understanding the UV Io footprint multiplicity?

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3505107b&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 5, CiteID L05107

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14

Planetary Sciences: Solar System Objects: Jupiter, Planetary Sciences: Solar System Objects: Io, Planetary Sciences: Fluid Planets: Aurorae, Planetary Sciences: Fluid Planets: Interactions With Particles And Fields, Planetary Sciences: Fluid Planets: Magnetic Fields And Magnetism

Scientific paper

The electromagnetic interaction between Io and the Jovian magnetosphere generates a UV auroral footprint in both Jovian hemispheres. Multiple spots were observed in the northern Jovian hemisphere when Io was in the northern part of the plasma torus and vice-versa for the South. Based on recent Hubble Space Telescope (HST) measurements, we report here the discovery of a UV leading spot, i.e., a faint emission located ahead of the main spot. The leading spot emerges at System III longitudes between 0° and 100° in the northern hemisphere and between 130° and 300° in the southern hemisphere, i.e., in one hemisphere when multiple spots are observed in the other hemisphere. We propose as one potential mechanism that electron beams observed near Io are related to the generation of the leading spot and the secondary spot in the opposite hemisphere.

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