Power transmission and particle acceleration along the Io flux tube

Details Power transmission and particle acceleration along the Io flux tube Power transmission and particle acceleration along the Io flux tube

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm23b1604h&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM23B-1604

Physics

[2704] Magnetospheric Physics / Auroral Phenomena, [2732] Magnetospheric Physics / Magnetosphere Interactions With Satellites And Rings

Scientific paper

Io's motion relative to the Jovian magnetic field generates a power of about 10^12 W which is thought to propagate as an Alfvén wave along the magnetic field line, until this power is transmitted to the electrons, which will then precipitate and generate the auroral phenomena that are observed from UV to Radio. That is the general overview of the Io-Jupiter interaction, however a more detailed look at it shows some difficulties: Can the Alfvén waves escape the torus or are they trapped inside? Where and how are the particles accelerated? In which direction? Is there enough power transmitted to the particles to explain the strong brightness of the auroral emissions in UV, IR, Visible and Radio? In other words : Can we make some global and consistent model of the Io-Jupiter which matches all the observations? We answer to these questions by making a review of the models and studies that have been proposed so far. We show that the Alfvén waves need to be filamented by some turbulent cascade process and accelerate the electrons at high latitude in order to explain the observations and to form a consistent scheme of the Io-Jupiter interaction.

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