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Stochastic Wave Growth, Power Balance, and Beam Evolution in Type III Solar Radio Sources

Robinson, P. A.

Energy-balance arguments are combined with the stochastic-growth theory of type III radio sources to determine the properties of the source in average dynamical equilibrium with the beam, and the beam's long-term evolution. Purely linear stochastic-growth theory has previously emphasized that the beam evolves to a state close to marginal stability…

Theoretical Plasma Distributions Consistent with ULYSSES Magnetic Field Observations in a Solar Wind Tangential Discontinuity

Tsurutani, B. T.; Roth, M.; De Keyser, J. +3 more

The overall multi-layer structure of the magnetic field profile observed by Ulysses across a broad solar wind tangential discontinuity can be reproduced fairly well by means of a kinetic model. Such a simulation provides complementary information about the velocity distribution functions, which are not always available from the plasma experiment d…

A `Ulysses' Cosmic-Ray Latitude Gradient Observation and Modulation Models

Keppler, E.; Quenby, J. J.; Drolias, B. +2 more

The `EPAC' instrument on Ulysses is sensitive to relativistic cosmic rays when far from Jupiter and in the absence of energetic solar particles. Measurement of the latitude gradient of these particles, after correction for time variations, has been made for the 1993-1994 south polar pass. The average magnitude of the gradient is about the same or …

Calculating the Plasma Deformation Tensor and Kinetic Vorticity from Magnetic Field Time Series: Applications to the Solar Wind

Moussas, X.; Polygiannakis, J. M.

It is shown that the magnetic induction equation reduces to an autoregressive model equation. Assuming weakly ergodic field variations in steady mean plasma flow, this model permits the estimation of the mean flow deformation tensor, velocity divergence and kinetic vorticity from magnetic field time series. Applications, made to hourly-averaged, i…