The present paper comprises a review of kinetic instabilities that may be operative in the
solar wind, and how they influence the dynamics thereof. The review is limited to collective …

We discuss selected ion kinetic processes relevant in the context of the expanding solar
wind. We focus on the role of wave-wave and wave-particle interactions, plasma instabilities …

We have performed a statistical study of a substantial amount of solar wind electron velocity
distribution functions (eVDFs). In our data set, we combine measurements acquired onboard …

We have performed a statistical study of a substantial amount of electron data acquired in
the solar wind to understand the constraints on electron temperature anisotropy by plasma …

We report an analysis of the proton temperature anisotropy evolution from 0.3 to 2.5 AU
based on the Helios and Ulysses observations. With increasing distance the fast wind data …

Magnetic field data acquired by the Ulysses spacecraft in high-speed streams over the poles
of the Sun are used to investigate the normalized magnetic helicity spectrum σ m as a …

The proton thermal energetics in the fast solar wind between 0.3 and 1 AU is reinvestigated
using the Helios 1 and 2 data. Closer to the Sun, it is estimated that, to account for the …

The frequency distribution of solar wind protons, measured in the vicinity of Earth's orbit, is
customarily plotted in (β∥, T⊥/T∥) phase space. Here, T⊥/T∥ is the ratio of perpendicular …

An analysis of ion non‐thermal properties in the fast solar wind based on Ulysses data is
reported. The radial evolution of the main proton moments (density, temperature, and drift …

Compressive fluctuations are a minor yet significant component of astrophysical plasma
turbulence. In the solar wind, long-wavelength compressive slow-mode fluctuations lead to …