Bibcode
Israelian, G.; Bertran de Lis, S.; Delgado Mena, E.; Adibekyan, V. Zh.
Bibliographical reference
Memorie della Societa Astronomica Italiana, v.85, p.265 (2014)
Advertised on:
2014
Citations
3
Refereed citations
3
Description
It is well known that at a given [Fe/H] below solar metallicities the
thick disk stars are more enhanced in their alpha -element abundances
than the thin disk. We report prelminary results for abundances of Cu,
Ba and Y in a sample of 762 stars observed with the HARPS spectrograph.
Precise and homogeneous abundance analysis reveals interesting trends
related to Galactic Chemical Evolution. Significant differences between
the thick and thin disk populations are found for [Cu/Fe], [Y/Fe] and
[Ba/Fe]. When comparing the abundance distributions in thick and thin
disks, we found that Ba and Y are underabundant, while Cu is
overabundant in thick disk stars at all metallicities. We found smooth
and distinct abundance trends that for the thin and thick disks are
clearly separated.
Related projects
Observational Tests of the Processes of Nucleosynthesis in the Universe
Several spectroscopic analyses of stars with planets have recently been carried out. One of the most remarkable results is that planet-harbouring stars are on average more metal-rich than solar-type disc stars. Two main explanations have been suggested to link this metallicity excess with the presence of planets. The first of these, the “self
Garik
Israelian