The binary stellar system η Carinae is one of very few established astrophysical hadron
accelerators. It seems likely that at least some fraction of the particles accelerated by η …

Aims. Observations of high-energy γ-rays recently revealed a persistent source in spatial
coincidence with the binary system η Carinae. Since modulation of the observed γ-ray flux …

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 …

Eta Car is surrounded by a thick shell of dust whose infrared emission is close to 5 x 10 exp
6 solar luminosities. We propose a new model for Eta Car in which cosmic rays originate in a …

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 …

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 …

Aims. The binary system η Carinae has completed its first 5.54 y orbit since the beginning of
science operation of the Fermi Large Area Telescope (LAT). We are now able to investigate …

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. Colliding-wind binaries are massive stellar systems featuring strong, interacting
winds. These binaries may be actual particle accelerators, making them variable γ-ray …

One of the most outstanding stellar object in our Galaxy, eta Carinae, a colliding wind binary
(CWB) with the largest mass loss rate observed, presents a hard X-ray emission and is …