Electron Acceleration on Jupiter-Io Flux Tube: Possible Generation Mechanism of S- Bursts

Details Electron Acceleration on Jupiter-Io Flux Tube: Possible Generation Mechanism of S- Bursts Electron Acceleration on Jupiter-Io Flux Tube: Possible Generation Mechanism of S- Bursts

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm23a0297s&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SM23A-0297

Physics

2704 Auroral Phenomena (2407), 2730 Magnetosphere: Inner, 2752 Mhd Waves And Instabilities (2149, 6050, 7836), 2753 Numerical Modeling, 2756 Planetary Magnetospheres (5443, 5737, 6033)

Scientific paper

Recently, Ergun et al. [2006] suggested that electron acceleration or modulation may provide the physical mechanism that transfers energy from the Alfvén wave to the S-burst. The modulated electron fluxes, in turn, may generate or modulate the generation of the S-burst emissions. The most successful explanation proposed for the generation radio emission from magnetized planets is the electron cyclotron maser in which radiation excited near the local electron cyclotron frequency is amplified through a gyroresonant interaction. Two types of electron cyclotron maser have been suggested: loss-cone maser due to the magnetic mirror and shell maser due to the parallel electric field in an anti-planetward current region. The first Earth-based S-burst observation was found to be associated with Alfvén waves and electron acceleration signatures. In this presentation, we will suggest that both loss-cone and shell electron distributions can be generated in a dynamic region associated with propagating Alfvén waves. Ergun, R. E., Y.-J. Su, L. A. Andersson, F. Bagenal, P. A. Delamere, R. L. Lysak, and R. J. Strangeway, S- Bursts and the Jupiter ionospheric Alfvén resonator, J. Geophys. Res., 111, A06212, doi:10.1029/2005JA011253, 2006.

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