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Direct observation of warping in the plasma sheet of Saturn
Krimigis, S. M.; Mitchell, D. G.; Paranicas, C. +2 more
The ENA images from the Ion Neutral CAmera (INCA) on the Cassini spacecraft are projected onto the noon-midnight plane of Sun-Saturn orbital coordinates, and a composite ``image'' of Saturn's plasma sheet is constructed from dawn-side observations of 20-50 keV hydrogens obtained from days 352 to 361 in 2004. The maxima in the intensity contours de…
Titan's magnetic field signature during the Cassini T34 flyby: Comparison between hybrid simulations and MAG data
Dougherty, M. K.; Glassmeier, K. -H.; Bertucci, C. +3 more
During the T34 flyby on 19 July 2007, the Cassini spacecraft passed through the magnetic pile-up region at Titan's ramside. The magnetic environment of Titan during this flyby is studied using a three-dimensional hybrid simulation model. This approach treats the electrons of the plasma as a massless, charge-neutralizing fluid, whereas the effects …
Is Enceladus' plume tidally controlled?
Halevy, I.; Stewart, S. T.
Explanations for the plume of gas, water vapor and ice particles jetting from rifts in Enceladus' south polar region include boiling of liquid water and dissociation of clathrate hydrates. In either case, production of the plume may be quasi-static or tidally controlled, with implications for the interior structure and composition of Enceladus. Pr…
Comparison of local energy conversion estimates from Cluster with global MHD simulations
Dandouras, I.; Buchert, S.; Vaivads, A. +3 more
The local energy conversion across the magnetopause has been estimated with Cluster for two magnetopause crossings. A load region, conversion from magnetic to particle energy, was identified on the dayside high-latitude magnetopause during south/dawnward IMF. Another crossing of the dawn flank magnetotail during dominantly duskward IMF was identif…
Longitudinal plasma density variations at Saturn caused by hot electrons
Delamere, P. A.; Bagenal, F.
A non-thermal tail to the electron distribution function has been measured in the inner magnetospheres of both Jupiter and Saturn. These ``hot'' electrons are only a small fraction (<1%) of the total electron density, yet their influence on the gas tori at Jupiter and Saturn is significant. We explore the role of hot electrons in both systems u…
Origin of Jovian hiss in the extended Io torus
Horne, Richard B.; Thorne, Richard M.; Wang, Kaiti
Plasma wave observations on Voyager, Ulysses, and Galileo have shown that whistler-mode hiss at frequencies below one kHz is continuously present in the extended Io torus of Jupiter. Cyclotron resonant energies at frequencies below 1 kHz are extremely high (typically > MeV), and the Jovian resonant electron flux is too low to cause significant …
Pulsations of auroral kilometric radiation at Pc1 frequencies
Pickett, Jolene; Hanasz, Jan; Schreiber, Roman +1 more
Cases of AKR pulsations at frequencies 1 to 4 Hz, typical for Pc1 geomagnetic pulsations, were observed from four Cluster spacecraft. 15 events were found in years 2001-2005, with 14 occurring in a recovery phase of a strong magnetic storm. In a studied event of 22 June 2003 the AKR pulses show positive frequency drifts, corresponding to the earth…