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Galactic O Stars
The catalog is a compilation of published data for 644 galactic O stars of luminosity class V. The catalog is intended to be useful to O-type star observers by providing a... -
Galactic O-Star Spectroscopic Survey (GOSSS)
This catalog is the result of combining the spectral types in 2011ApJS..193...24S (Paper I) and 2014ApJS..211...10S (Paper II), the first two major papers of the Galactic O-Star... -
IUE Atlas of O-Type Stellar Spectra
The International Ultraviolet Explorer Atlas of O-Type Spectra From 1200 to 1900 A (Walborn et el. 1985) lists normalized fluxes and flux quality factors, splice points, and... -
Galactic O-type Stars
The catalog is a compilation from the literature of all O-type stars for which spectral types, luminosity classes, and UBV photometry exist. The catalog contains 765 stars, for... -
Wolf-Rayet and O-star runaways kinematics
Reliable systemic radial velocities are almost impossible to secure for Wolf-Rayet stars, difficult for O stars. Therefore, to study the motions - both systematic in the Galaxy... -
RV survey of the Carina Nebula's O stars
We have obtained multi-epoch observations of 31 O-type stars in the Carina Nebula using the CHIRON spectrograph on the CTIO/SMARTS 1.5-m telescope. We measure their radial... -
RV catalogue of O-type stars in NGC 6231
We present the results of a long-term high-resolution spectroscopy campaign on the O-type stars in NGC 6231. We revise the spectral classification and multiplicity of these... -
Massive binaries in the LMC
The stellar mass-luminosity relation is poorly constrained by observations for high-mass stars. We describe our program to find eclipsing massive binaries in the Magellanic... -
AE Aur and iota Ori runaway stars RV curves
We present the results of our spectroscopic monitoring observations of the late O-type runaway stars AE Aur and iota Ori, carried out between September 2016 and May 2018 using... -
O, B-type & red supergiant masses and luminosities
Massive stars are of interest as progenitors of supernovae, i.e. neutron stars and black holes, which can be sources of gravitational waves. Recent population synthesis models... -
Massive binary stars from an HST/FGS survey
We present the results of an all-sky survey made with the Fine Guidance Sensor on the Hubble Space Telescope to search for angularly resolved binary systems among massive stars.... -
Radial Velocities of Galactic O-type stars I.
We present radial velocities for 18 Galactic O-type stars. These stars display small radial velocity scatter over timescales of one to two weeks. Some of them are long-period... -
Triple star delta Ori radial velocities
Delta Orionis is the closest massive multiple stellar system and one of the brightest members of the Orion OB association. The primary (Aa1) is a unique evolved O star. In this... -
CHIPS II. O stars in Trumpler 14 CHIPS-Tr14
Most massive stars belong to multiple systems, yet the formation process leading to such high multiplicity remain insufficiently understood. To help constrain the different... -
VLTS. Properties of O dwarf in 30 Dor
The VLT-FLAMES Tarantula Survey has observed hundreds of O-type stars in the 30 Doradus region of the Large Magellanic Cloud (LMC). We study the properties of 105 apparently... -
O-stars in VLT-FLAMES Tarantula Survey
The 30 Doradus (30 Dor) region of the Large Magellanic Cloud, also known as the Tarantula Nebula, is the nearest starburst region. It contains the richest population of massive... -
Cygnus OB1-OB4 O stars radial velocities
Establishing the multiplicity of O-type stars is the first step towards accurately determining their stellar parameters. Moreover, the distribution of the orbital parameters... -
Galactic massive stars with AstraLux
Massive stars have high-multiplicity fractions, and many of them have still undetected components, thus hampering the study of their properties. I study a sample of massive... -
UBVJHK synthetic photometry of Galactic O stars
The development of powerful infrared observational techniques enables the study of very extincted objects and young embedded star-forming regions. This is especially interesting... -
Spectroscopic study of Of^+^ supergiants
The transition from early Of stars to WN-type objects is poorly understood. O-type supergiants with emission lines (OIf^+^) are considered to be intermediate between these two...
