We have calculated a grid of massive star wind models and mass-loss rates for a wide
range of metal abundances between . The calculation of this grid completes the Vink et al. (2000) …

Clumping-corrected mass-loss rates of 64 Galactic Wolf-Rayet (WR) stars are used to study
the dependence of mass-loss rates, momentum transfer efficiencies and terminal velocities …

An atlas of theoretical P Cygni-type line profiles is presented. The profiles are calculated by
assuming resonance scattering and using the Sobolev approximation. The expanding …

Spectra taken with the Short Wavelength Spectrometer on board of the Infrared Space
Observatory of dust shells around evolved oxygen-rich stars reveal the presence of several …

We present a simple analytical description of the disruption of star clusters in a tidal field. The
cluster disruption time, defined as t dis , depends on the mass M of the cluster as t dis with …

Globular clusters (GCs), once thought to be well approximated as simple stellar populations
(ie all stars having the same age and chemical abundance), are now known to host a variety …

A new method for calculating line profiles formed in spherically symmetric stellar winds in
which the velocity increases monotonically outward is described. The source function is …

We investigate encounters between giant molecular clouds (GMCs) and star clusters. We
propose a single expression for the energy gain of a cluster due to an encounter with a GMC, …

We have derived the disruption times of star clusters from cluster samples of four galaxies,
M51, M33, the Small Magellanic Cloud (SMC) and the solar neighbourhood. If the disruption …

We use archival Hubble Space Telescope observations of broad-band images from the
ultraviolet (F255W-filter) through the near infrared (NICMOS F160W-filter) to study the star cluster …