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...

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...

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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...

We present high-resolution spectroscopic measurements of the abundances of the α-like element titanium (Ti) and s-process elements yttrium (Y) and lanthanum (La...

In this paper we review the current situation regarding the study of the metallicity-giant planet connection. We show that planet-host stars are more metal-rich...

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We performed numerical simulations of mergers between gas-rich disc galaxies, which result in the formation of late-type galaxies. Stars formed during the...

Stellar Kinematic Groups are kinematical coherent groups of stars which might share a common origin. These groups spread through the Galaxy over time due to...