Astrophysical: Star clusters

  • Publication
    The impact of galaxy harassment on the globular cluster systems of early-type cluster dwarf galaxies
    The dynamics of globular cluster systems (GCSs) around galaxies are often used to assess the total enclosed mass, and even to constrain the dark matter...
  • Publication
    The intermediate age open cluster NGC 7044
    A photometric analysis is conducted of the open cluster NGC 7044, on the basis of UBVR CCD observations of 896 stars in the cluster field. Reddening and...
  • Publication
    The Kinematics and Dynamics of the Globular Clusters and Planetary Nebulae of NGC 5128
    A new kinematic and dynamic study of the halo of the giant elliptical galaxy NGC 5128 is presented. From a spectroscopically confirmed sample of 340 globular...
  • Publication
    The maximum stellar mass, star-cluster formation and composite stellar populations
    We demonstrate that the mass of the most massive star in a cluster correlates non-trivially with the cluster mass. A simple algorithm, according to which a...
  • Publication
    The most recent burst of star formation in the massive elliptical galaxy NGC 1052
    High spatial resolution near-infrared (NIR) images of the central 24 × 24 arcsec2 (˜2 × 2 kpc2) of the elliptical galaxy NGC 1052 reveal a total of 25 compact...
  • Publication
    The nearest extreme starburst: bubbles, young star clusters and outflow in the merger NGC 3256
    We have studied the extreme starburst in the infrared merger NGC 3256. We detect four galactic bubbles (using ESO New Technology Telescope and Hubble Space...
  • Publication
    The NGC 346 massive star census. Nitrogen abundances for apparently single, narrow lined, hydrogen core burning B-type stars
    Previous analyses of two large spectroscopic surveys of early-type stars in the Large Magellanic Cloud (LMC) have found an excess of nitrogen enriched B-type...
  • Talk
    The nuclei of galaxies
    The centers of massive galaxies are special in many ways, not least because all of them are believed to host supermassive black holes. Since the discovery of a...
  • Publication
    The nucleus of NGC 253 and its massive stellar clusters at parsec scales
    Very Large Telescope adaptive optics images of NGC 253 with resolutions down to 200mas resolve the central 300pc of this galaxy in ~37 infrared (IR) bright...