Jupiter's Polar Regions in the Ultraviolet as Imaged by HST/WFPC2: Auroral-Aligned Features and Zonal Motions
Vincent, Mark B; Clarke, John T; Ballester, Gilda E; Harris, Walter M; West, Robert A; Trauger, John T; Evans, Robin W; Stapelfeldt, Karl R; Crisp, David; Burrows, Christopher J; Gallagher, John S; Griffiths, Richard E; Hester, J Jeff; Hoessel, John G; Holtzman, Jon A; Mould, Jeremy; Scowen, Paul A; Watson, Alan M; Westphal, James A
Jupiter's polar regions are examined using ultraviolet (UV, 120-320 nm) images obtained with the Hubble Space Telescope Wide Field and Planetary Camera 2 over the period of 1994-1997. These images probe the stratospheric aerosols at pressures of a few tens of millibars. We discovered a UV-darkened segment in the polar shading just equatorward of the north polar hood that remained aligned with the southern-most portion of the north auroral oval. The darkened segment generally extended over...[Show more]
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