Three-dimensional adaptive mesh refinement hydrodynamical simulations of the wind–wind
collision between the enigmatic supermassive star η Car and its mysterious companion star …

Cosmic-ray acceleration has been a long-standing mystery, and, despite more than a
century of study, we still do not have a complete census of acceleration mechanisms. The …

Context. η Carinae is the colliding wind binary with the highest mass-loss rate in our Galaxy
and the only one in which hard X-ray emission has been detected. Aims. η Carinae is …

Context. The η Carinae binary system hosts one of the most massive stars, which features
the highest known mass-loss rate. This dense wind encounters the much faster wind …

Particle-accelerating colliding-wind binaries (PACWBs) are multiple systems made of early-
type stars able to accelerate particles up to relativistic velocities. The relativistic particles can …

Context. Recently, the colliding-wind region of the binary stellar system HD 93129A was
resolved for the first time using Very Large Baseline Interferometry. This system, one of the …

Context. The most massive binary system Eta Carinae has been recently established as a
gamma-ray source by the AGILE and Fermi-LAT detectors. The high energy spectrum of this …

Abstract η Car is the only colliding-wind binary for which high-energy γ rays are detected.
Although the physical conditions in the shock region change on time-scales of hours to days …

The massive binary system Eta Carinae and the surrounding H ii complex, the Carina
nebula, are potential particle acceleration sites from which very high energy (VHE; E≥ 100 …

We present a model for the non-thermal emission from a colliding-wind binary. Relativistic
protons and electrons are assumed to be accelerated through diffusive shock acceleration …