Journal article
Equatorward diffuse auroral emissions at Jupiter: Simultaneous HST and Galileo observations
Geophysical research letters, Vol.36(7), pp.L07101-n/a
04/16/2009
DOI: 10.1029/2009GL037857
Abstract
We study the auroral emissions equatorward of the main oval based on Hubble Space Telescope (HST) observations of both Jovian hemispheres on September 20, 1997. On the same day, Galileo observed changes in the electron pitch angle distribution between the inner and middle magnetosphere (PAD boundary), indicative of electron diffusion. This region, magnetically maps to the equatorward diffuse emissions on both hemispheres. Whistler mode waves, observed simultaneously, can scatter electrons into the loss cone and lead to electron precipitation in the ionosphere. Based on simultaneous HST FUV and Galileo wave and electron data we test the conditions for electron scattering by whistler mode waves and derive the energy flux precipitated in the ionosphere. The comparison of the derived precipitation energy flux with the observed auroral brightness indicates that the energy contained in the PAD boundary can account for the auroral emissions. Citation: Radioti, A., A. T. Tomas, D. Grodent, J.-C. Gerard, J. Gustin, B. Bonfond, N. Krupp, J. Woch, and J. D. Menietti (2009), Equatorward diffuse auroral emissions at Jupiter: Simultaneous HST and Galileo observations, Geophys. Res. Lett., 36, L07101, doi:10.1029/2009GL037857.
Details
- Title: Subtitle
- Equatorward diffuse auroral emissions at Jupiter: Simultaneous HST and Galileo observations
- Creators
- A. Radioti - University of LiègeA. T. Tomas - Helmholtz Centre Potsdam - GFZ German Research Centre for GeosciencesD. Grodent - University of LiègeJ. -C. Gerard - University of LiègeJ. Gustin - University of LiègeB. Bonford - University of LiègeN. Krupp - Max Planck Institute for Solar System ResearchJ. Woch - Max Planck Institute for Solar System ResearchJ. D. Menietti - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Geophysical research letters, Vol.36(7), pp.L07101-n/a
- Publisher
- Amer Geophysical Union
- DOI
- 10.1029/2009GL037857
- ISSN
- 0094-8276
- eISSN
- 1944-8007
- Number of pages
- 5
- Grant note
- European Space Agency; European Commission Belgian Fund for Scientific Research (FNRS); Fonds de la Recherche Scientifique - FNRS NAS5-26555 / AURA, inc.
- Language
- English
- Date published
- 04/16/2009
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984627189902771
Metrics
1 Record Views