Understanding the physical mechanisms that control galaxy formation is a fundamental
challenge in contemporary astrophysics. Recent advances in the field of astrophysical …

Pulsar halos are extended gamma-ray structures generated by electrons and positrons
escaping from pulsar wind nebulae (PWNe), considered a new class of gamma-ray sources …

The recent detection of the Geminga pulsar wind nebula (PWN) by HAWC in the multi-TeV
band allows us to infer precious information about the transport of pairs in the immediate …

Energetic non-thermal particles, or cosmic rays, are a major component of astrophysical
plasmas next to magnetic fields, radiation, and thermal gas. Cosmic rays are usually sub …

Context. Extended gamma-ray emission, interpreted as halos formed by the inverse-
Compton scattering of ambient photons by electron-positron pairs, is observed toward a …

Cosmic rays (CRs) are thought to escape their sources streaming along the local magnetic
field lines. We show that this phenomenon generally leads to the excitation of both resonant …

Cosmic rays (CRs) are ubiquitous in the interstellar medium (ISM) of nearby galaxies, but
many of their properties are not well-constrained. Gamma-ray observations provide a …

Galaxy evolution is an important topic, and our physical understanding must be complete to
establish a correct picture. This includes a thorough treatment of feedback. The effects of …

Diffusive TeV gamma-ray emissions have been recently discovered extending beyond the
pulsar wind nebulae of a few middle-aged pulsars, implying that energetic electron/positron …

Aims. We investigate the damping of Alfvén waves generated by the cosmic-ray resonant
streaming instability in the context of cosmic-ray escape and propagation in the proximity of …