We provide the first direct observations of interstellar H+ and He+ pickup ions in the solar
wind from 22 to 38 au. We use the Vasyliunas and Siscoe model functional form to quantify …

The helium gravitational focusing cone has been observed using pickup He+, first during the
solar minimum in 1984–1985 with the AMPTE/IRM spacecraft, and again in more detail from …

First results from NASA's Interplanetary Boundary Explorer mission showed an unexpected"
ribbon" of enhanced energetic neutral atom (ENA) flux spanning most of the sky. One …

Pioneering observations of the diffuse HeI-58.4 nm background radiation were performed
with a series of satellites in the 70's. Today, their published results on the flow of interstellar …

This paper is devoted to the problem of particle acceleration in the closest to the Sun
Hermean magnetosphere. We discuss few available observations of energetic particles in …

We develop a theoretical model for particle superdiffusive transport parallel to the average
magnetic field, due to the pitch-angle scattering times having a non-Markovian, power-law …

Context. He+ pickup ions are either born from the ionization of interstellar neutral helium
inside our heliosphere, the so-called interstellar pickup ions, or through the interaction of …

We provide a proof of concept that the pickup ion (PUI) cutoff speed variation with ecliptic
longitude can provide the interstellar neutral (ISN) flow longitude ${\lambda} _ {\mathrm …

Particle acceleration at magnetized purely perpendicular relativistic shocks in electron–ion
plasmas is studied by means of two-dimensional particle-in-cell simulations. Magnetized …

Context. The interstellar flow longitude corresponds to the Sun's direction of movement
relative to the local interstellar medium. Thus, it constitutes a fundamental parameter for our …