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Multi-fluid simulations of Ganymede's magnetosphere

Paty, Carol; Winglee, Robert

Comparative studies of 3D multi-fluid simulations with Galileo magnetometer data are used to develop a quantitative model of the currents and fields within Ganymede's magnetosphere as well as its bulk plasma environment. The model includes contributions from Jupiter's magnetosphere and the flux of different ion species originating from Ganymede's …

Detection of the southern counterpart of the Jovian northern polar cusp: Shared properties

Prangé, Renée; Pallier, Laurent

A transient auroral feature in the northern (N) polar region of Jupiter, referred to as an `auroral flare' [Waite et al., 2001], or as the N polar cusp [Pallier and Prangé, 2001], strangely seemed to lack any southern (S) counterpart. Here, using a new HST/STIS dataset, we find a similar bright spot in the south. We suggest that both features are …

Seasonal change in Titan's haze 1992-2002 from Hubble Space Telescope observations

Lorenz, Ralph D.; Lemmon, Mark T.; Smith, Peter H.

Images from the Hubble Space Telescope (HST) document the seasonal migration of haze in Titan's atmosphere. Image profiles show darkening of the north relative to the south at 439 nm (blue) but no change at 619 nm. The limb profile at 889 nm has inverted, becoming north-bright, a variation consistent with haze transport towards the winter hemisphe…

Direct imaging of Titan's extended haze layer from HST observations

Young, E. F.; Puetter, R.; Yahil, A.

In the early 1980s, both Voyager spacecraft imaged a detached haze layer surrounding Titan, separated from the main haze distribution by a gap at around ~300 km and merging into a hood of more concentrated haze at Titan's north pole. We have processed Hubble Space Telescope images of Titan with Lucy-Richardson and PIXON deconvolution software and …