Solar energetic particles, or SEPs, from suprathermal (few keV) up to relativistic (∼∼ few
GeV) energies are accelerated near the Sun in at least two ways:(1) by magnetic …

Radio observations prove the existence of relativistic particles and magnetic field associated
with the intra-cluster-medium (ICM) through the presence of extended synchrotron emission …

A critical review of the standard paradigm for the origin of Galactic cosmic rays (CRs) is
presented. Recent measurements of local and far-away CRs reveal unexpected behaviors …

The theory of first order Fermi acceleration at collisionless astrophysical shock fronts is
reviewed. Observations suggest that shock waves in different astrophysical environments …

Beginning with the equations of the convection-diffusion model including energy losses, it is
shown that the streaming of galactic cosmic rays in the solar-wind cavity can be neglected …

We present version 2 of the DRAGON code designed for computing realistic predictions of
the CR densities in the Galaxy. The code numerically solves the interstellar CR transport …

Abstract Solar Energetic Particle (SEP) events are interesting from a scientific perspective as
they are the product of a broad set of physical processes from the corona out through the …

The origin of the highest energy cosmic rays is still unknown. The discovery of their sources
is expected to reveal the workings of the most energetic astrophysical accelerators in the …

The interaction between galactic cosmic rays and Alfvé n waves in the interstellar medium
is investi-gated. They may interact adiabatically through magnetic mirror scattering or non …

Measurements of the total energy, cross helicity, and magnetic helicity of the solar wind at 1,
2.8, and 5 AU are presented. These quantities are the three rugged invariants of three …