-
VLTS. O giants and supergiants nitrogen abundances
Theoretically, rotation-induced chemical mixing in massive stars has far reaching evolutionary consequences, affecting the sequence of morphological phases, lifetimes,... -
Complete sample of OB stars within 350pc
The sample of 37485 suspected OB stars selected by Gontcharov (2008AstL...34....7G) from the Tycho-2 catalogue has been cleaned of the stars that are not of spectral types... -
MiMeS magnetic analysis of O-type stars
We present the analysis performed on spectropolarimetric data of 97 O-type targets included in the framework of the Magnetism in Massive Stars (MiMeS) Survey. Mean least-squares... -
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... -
Rotational velocities of O stars in clusters
We present the results of a study aimed at assessing whether low and high-mass stars form similarly. Our approach is (1) to examine the observed projected rotational velocities... -
Young stellar pop. in Carina nebula and Car OB1
We use Gaia DR3 astrometry and photometry to analyze the spatial distribution of the young stellar populations and stellar clusters, and to search for new OB star candidates in... -
Gaia distances to the Carina Nebula Complex
The Carina Nebula Complex (CNC) is one of the most massive and active star forming regions in our Galaxy and contains several large young star clusters. The distances of the... -
Extinction towards Galactic O stars
O stars are excellent tracers of the intervening ISM because of their high luminosity, blue intrinsic SED, and relatively featureless spectra. We are currently conducting the... -
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... -
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... -
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... -
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... -
SMaSH+: observations and companion detection
Multiplicity is one of the most fundamental observable properties of massive O-type stars and offers a promising way to discriminate between massive star formation theories....
