Context. The quest to detect dormant stellar-mass black holes (BHs) in massive binaries (ie
OB+ BH systems) is challenging; only a few candidates have been claimed to date, all of …

Context. Two scenarios have been proposed to match the existing observational constraints
of the object HR 6819. The system could consist of a close inner B-type giant plus a black …

Context. This is the second paper of a series on Galactic OB groups that uses astrometric
and photometric data from Gaia and spectral classifications from the Galactic O-Star …

Context. The nature of mass-loss in massive stars is one of the most important and difficult to
constrain processes in the evolution of massive stars. The largest observational …

Although significant progress has been achieved in recent surveys of the magnetism in
massive stars, the origin of the detected magnetic fields remains to be the least understood …

We present the first spectroscopic orbit of the O-type double-lined star HD 168112 A, B. We
analyse 101 high-resolution optical spectra identifying the absorption lines of both …

Context. The study of the multiplicity of massive stars gives hints on their formation
processes and their evolutionary paths, which are still not fully understood. Large separation …

Massive stars (those≥ 8 solar masses at formation) have radiative envelopes that cannot
sustain a dynamo, the mechanism that produces magnetic fields in lower-mass stars …

Identifying trends between observational data and the range of physical parameters of
massive stars is a critical step to the still-elusive full understanding of the source, structure …

Context. The majority of massive stars are located in binary or multiple star systems.
Compared to single stars, these objects pose additional challenges to quantitative analyses …