Abstract The Solar Wind Electrons Alphas and Protons (SWEAP) Investigation on Solar
Probe Plus is a four sensor instrument suite that provides complete measurements of the …

The solar wind is a magnetized plasma and as such exhibits collective plasma behavior
associated with its characteristic spatial and temporal scales. The characteristic length …

The theory of nearly incompressible magnetohydrodynamics (NI MHD) was developed
largely in the early 1990s, together with an important extension to inhomogeneous flows in …

We present a new version of the Alfvén wave solar model, a global model from the upper
chromosphere to the corona and the heliosphere. The coronal heating and solar wind …

Coronal holes are the darkest and least active regions of the Sun, as observed both on the
solar disk and above the solar limb. Coronal holes are associated with rapidly expanding …

This paper summarises some of the recent progress that has been made in understanding
astrophysical plasma turbulence in the solar wind, from in situ spacecraft observations. At …

Solar wind is probably the best laboratory to study turbulence in astrophysical plasmas. In
addition to the presence of magnetic field, the differences with neutral fluid isotropic …

We consider ion heating by turbulent Alfvén waves (AWs) and kinetic Alfvén waves (KAWs)
with wavelengths (measured perpendicular to the magnetic field) that are comparable to the …

The power spectrum of magnetic fluctuations in the solar wind at 1 AU displays a break
between two power laws in the range of spacecraft‐frame frequencies 0.1 to 1 Hz. These …

We develop a one-dimensional solar-wind model that includes separate energy equations
for the electrons and protons, proton temperature anisotropy, collisional and collisionless …