Chemical clues on the formation of planetary systems
Theoretical studies suggest that C/O and Mg/Si are the most important elemental ratios in determining the mineralogy of terrestrial planets. The C/O ratio...
Chemical Composition and Temperature Fluctuations in M17
We present echelle spectroscopy in the 3500 to 10300 Angstroms range for two positions of the galactic H ii region M17. The data have been obtained using the 2...
Chemical composition of secondary stars in LMXBs: implications on the progenitors of black holes and neutron stars
Recent studies of chemical abundances of secondary stars in low mass X-ray binaries have opened a new window to obtain information on the progenitors of black...
Chemical composition of stellar populations in ω Centauri
We derive abundances of Fe, Na, O, α and s-elements from GIRAFFE@VLT spectra for more than 200 red giant stars in the Milky Way satellite ω Centauri. Our...
Chemical compositions of stars in the light of non-LTE spectral line formation: the evolution of carbon and oxygen in the Galaxy
Non-LTE effects affect the formation of many spectral features in the spectra of late-type stars. This thesis investigates the effect on carbon and oxygen...
Chemical evolution in star clusters: the role of mass and environment.
The process of chemical self-enrichment in stellar systems can be affected by the total mass of the system and the conditions of the large-scale environment...
Chemical Evolution of the Galaxy and Supernova Yields after UVES
The atmospheres of stars orbiting around black holes/neutron stars may contain a large amount of α and r-process elements as a result of contamination with the...