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Thermal history and large scale differentiation of the Saturn's satellite Rhea
Czechowski, Leszek
Thermal history of Rhea from the beginning of accretion is investigated. We developed a numerical model of convection combined with the parameterized theory. Large scale melting of the satellite's matter and gravitational differentiation of silicates from ices are included. The results are confronted with observational data from Cassini spacecraft…
Sublimation-driven evolution of the local radius and the moment of inertia of short-period comets
Dziak-Jankowska, Beata
This article is a continuation of the previous one considering the evolution of a long-period comet. The changes of the local radius and the moment of inertia as well as the orientation of the rotation axis are calculated. With reference to the previous model, the time-dependent orbital parameters are introduced. The procedure of sublimation-drive…
Nonlinear plasma wave processes observed in the polar cusp
Błęcki, Jan; Wronowski, Roman; Parrot, Michel +1 more
We present observations of electric and magnetic field variations from proton (about few Hz) to electron cyclotron frequencies (about few kHz) obtained by STAFF instrument on Cluster satellites during two cusp crossings, at ∼6 RE altitude, in September 2002. The cusp was identified by the presence of intensive fluxes of counter streamin…