The striking broad emission line spectroscopic appearance of Wolf-Rayet (WR) stars has
long defied analysis, owing to the extreme physical conditions within their line-and …

Mass loss is a key process in the evolution of massive stars, and must be understood
quantitatively if it is to be successfully included in broader astrophysical applications such as …

We report the results of the first-epoch observation with the ACIS-I instrument on the
Chandra X-Ray Observatory of Sagittarius A*(Sgr A*), the compact radio source associated …

The dynamics of the wind and shock structure formed by the wind collision in early-type
binary systems is examined by means of a 2D hydrodynamics code, which self-consistently …

The VIIth catalogue of galactic PopulationI Wolf–Rayet stars provides improved coordinates,
spectral types and bv photometry of known WR stars and adds 71 new WR stars to the …

▪ Abstract Radio astronomy has provided evidence for the presence of ionized atmospheres
around almost all classes of nondegenerate stars. Magnetically confined coronae dominate …

We have produced a catalog of 378 Galactic O stars with accurate spectral classifications
that is complete for V< 8 but includes many fainter stars. The catalog provides cross …

We present high-resolution spectroscopic monitoring of the line-profile variations (LPVs) in
the He II λ 5411 emission line of four Wolf-Rayet (WR) stars of the WN sequence (HD 96548 …

We present new observations of η Carinae, strongly suggesting that it is a binary system.
High dispersion measurements of the broad Paγ emission line show periodic radial velocity …

We construct revised near-infrared absolute magnitude calibrations for 126 Galactic Wolf–
Rayet (WR) stars at known distances, based in part upon recent large-scale spectroscopic …