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 …

Non-thermal particles and high-energy radiation can play a role in the dynamical processes
in star-forming regions and provide an important piece of the multiwavelength observational …

The γ-ray sky> 100 MeV is dominated by the diffuse emissions from interactions of cosmic
rays with the interstellar gas and radiation fields of the Milky Way. Observations of these …

Supernova remnants are beautiful astronomical objects that are also of high scientific
interest, because they provide insights into supernova explosion mechanisms, and because …

The origin of Galactic cosmic rays is a century-long puzzle. Indirect evidence points to their
acceleration by supernova shockwaves, but we know little of their escape from the shock …

Star-forming galaxies have been predicted to contribute considerably to the diffuse gamma-
ray background as they are guaranteed reservoirs of cosmic rays. Assuming that the …

We compute the production of cosmic rays (CRs) in the dynamical superbubble (SB)
produced by a cluster of massive stars. Stellar winds, supernova remnants, and turbulence …

We evaluate the current status of supernova remnants as the sources of Galactic cosmic
rays. We summarize observations of supernova remnants, covering the whole …

Diffusive shock acceleration is the theory of particle acceleration through multiple shock
crossings. In order for this process to proceed at a rate that can be reconciled with …

Observations indicate that most massive stars in the Galaxy appear in groups, called OB
associations, where their strong wind activity generates large structures known as …