Jupiter 2μm Auroral Imaging with CFHT/FTS/BEAR: Thermospheric Ion and Neutral Winds

Details Jupiter 2μm Auroral Imaging with CFHT/FTS/BEAR: Thermospheric Ion and Neutral Winds Jupiter 2μm Auroral Imaging with CFHT/FTS/BEAR: Thermospheric Ion and Neutral Winds

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa22a..07g&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA22A-07

Physics

5704 Atmospheres (0343, 1060), 5706 Aurorae, 5729 Ionospheres (2459), 5754 Polar Regions, 6220 Jupiter

Scientific paper

Spectro-imaging infrared observations with the Canada-France-Hawaii Telescope (CFHT) FTS/BEAR instrument were obtained in Oct.~1999 and Oct.~2000, and were first reported by Raynaud et al., Icarus (2004). Images of the H2 S_1(1) quadrupole emission line and several H_3+ emission lines reveal a different morphology for the neutrals and ions. The H_3+ ion temperatures and column densities were determined. A northern "hot spot" similar to polar features observed at UV and X-ray wavelengths was identified in H_3+ images, but is absent in H2 images for reasons yet to be explained. We continued the analysis of these data to investigate Doppler shifts indicative of the thermospheric ion and neutral winds. Maps of winds in the auroral zones are created after correction for rotational velocity in the image cubes by cross-comparison of the emission line centroids. We report a preliminary analysis of the observations and auroral thermosphere wind maps. Few observations of the upper atmospheric wind velocities are available, yet these winds are crucial information to constrain JTGCM models and improve our understanding of dynamical heating and magnetosphere-ionosphere coupling.

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