Non-degenerate stars of essentially all spectral classes are soft X-ray sources. Their X-ray
spectra have been important in constraining physical processes that heat plasma in stellar …

Previous generations of X-ray observatories revealed a group of massive binaries that were
relatively bright X-ray emitters. This was attributed to emission of shock-heated plasma in the …

Motivated by the recent high-precision measurements of cosmic rays by several new-
generation experiments, we have carried out a detailed study to understand the observed …

Massive systems made of two or more stars are known to be the site for interesting physical
processes–including at least in some cases–particle acceleration. Over the past decade, this …

We use hydrodynamical models of the wind-collision region in the archetype colliding-wind
system WR 140 to determine the spatial and spectral distributions of the radio, X-ray, and γ …

Context. INTEGRAL, the European Space Agency's γ-ray observatory, tripled the number of
super-giant high-mass X-ray binaries (sgHMXB) known in the Galaxy by revealing absorbed …

We report here results from a Chandra ACIS observation of the stellar populations in and
around the M17 H II region. The field reveals 886 sources with observed X-ray luminosities …

The dynamics of the wind–wind collision in massive stellar binaries are investigated using
3D hydrodynamical models which incorporate gravity, the driving of the winds, the orbital …

Archival X-ray spectra of the four prominent single, non-magnetic O stars ζ Pup, ζ Ori, ξ Per
and ζ Oph, obtained in high resolution with Chandra HETGS/MEG have been studied. The …

We present the first high spatial resolution X-ray study of NGC 2244, the 2 Myr old stellar
cluster in the Rosette Nebula, using Chandra. Over 900 X-ray sources are detected; 77 …