Radiation-driven mass loss largely determines the life expectancy of massive stars. I will present our most recent mass-loss predictions for massive stars...
On the massive star-forming capacity of molecular clouds
Assuming that photoionization is the self-limiting process for continued star formation, we estimate the maximum number of massive (OB) stars that can form...
On the O/Fe versus Fe/H relationship and the progenitors of type I supernovae
The new observational O/Fe versus Fe/H abundance relationship for halo stars is studied in terms of several models of chemical evolution for the solar...
On the search for transition zone lines in late A type stars
Observations of the 1400-1800 A region in late A type stars are presented, which were obtained using the IUE satellite at low and high resolution. The...
Phase-dependent Study of Near-infrared Disk Emission Lines in LB-1
The mass, origin, and evolutionary stage of the binary system LB-1 have been intensely debated, following the claim that it hosts an ∼70M ☉ black hole, in stark...
PHL 932 - Another non-post-AGB central star of planetary nebula
The very high surface gravity and low temperature of PHL 932, a hot subluminous star surrounded by a planetary nebula, imply that it cannot be a post-AGB star...
Physical parameters of the intermediate age open cluster IC 1311: Clues for the theory of stellar evolution
The results of a UBVR photometric study in the field of the open cluster IC 1311 are presented. A comparison with previously published results on NGC 7044...
PLANETARY PIECES: PUTING THE CLUES TOGETHER USING WHITE DWARFS
Planetary systems have been found systematically orbiting main sequence stars and red giants. But the detection of planets per se during the white dwarf phase...
We will start by recalling the effects of rotation on stellar evolution and briefly explain its implementation in a stellar evolution code. We will present a...