Lines of research: The Milky Way and the Local Group (MWLG)

The Milky Way and the Local Group (MWLG)
  • Publication
    New very massive stars in Cygnus OB2
    Context: The compact association Cygnus OB2 is known to contain a large population of massive stars, but its total mass is currently a matter of debate. While...
  • Publication
    NGC 1624-2: a slowly rotating, X-ray luminous Of?cp star with an extraordinarily strong magnetic field
    This paper presents a first observational investigation of the faint Of?p star NGC 1624-2, yielding important new constraints on its spectral and physical...
  • Publication
    NGC 2419: a large and extreme second generation in a currently undisturbed cluster
    We analyse complementary Hubble Space Telescope and Subaru data for the globular cluster NGC 2419. We make a detailed analysis of the horizontal branch (HB)...
  • Publication
    NGC 2579 and the carbon and oxygen abundance gradients beyond the solar circle
    We present deep echelle spectrophotometry of the Galactic H II region NGC 2579. The data have been taken with the Very Large Telescope Ultraviolet-Visual...
  • Publication
    NGC 6705 a young α-enhanced open cluster from OCCASO data
    Context. The stellar [α/Fe] abundance is sometimes used as a proxy for stellar age, following standard chemical evolution models for the Galaxy, as seen by...
  • Publication
    Nitrogen abundances of the Be-type stars in 30 Doradus
    A sub-set of the 67 Be-type stars observed in 30 Doradus during the VLT-FLAMES Tarantula Survey (VFTS) campaign have been analysed to estimate atmospheric...
  • Publication
    No temperature fluctuations in the giant H II region H 1013
    While collisionally excited lines in H ii regions allow one to easily probe the chemical composition of the interstellar medium in galaxies, the possible...
  • Publication
    Non-synchronous rotations in massive binary systems. HD 93343 revisited
    Context. Most massive stars are in binary or multiple systems. Several massive stars have been detected as double-lined spectroscopic binaries and among these...
  • Publication
    Nonaxisymmetric models of galaxy velocity maps
    Galaxy velocity mapsoften show the typical pattern of a rotating disk, consistent with the dynamical model where emitters rotate in circular orbits around the...