Bibcode
Bertran de Lis, S.; Israelian, G.; Delgado Mena, E.
Bibliographical reference
Memorie della Societa Astronomica Italiana, v.85, p.261 (2014)
Advertised on:
2014
Citations
0
Refereed citations
0
Description
We present a detailed and uniform study of oxygen abundances in a large
sample of solar-type stars. EW measurements were carried out for the
[OI] 6300 Å and the OI 6158 Å lines and LTE abundance
results for these indicators were obtained in 611 and 535 stars
respectively. 411 stars have oxygen derived from both indicators, which
allows us to perform the first uniform comparision of these two oxygen
indicators in a large sample of stars. We found that 65% of the stars
yield abundances that agree within 0.1dex, and this result improves for
better values of signal-to-noise. We also have studied the oxygen trends
for different galactic populations. We confirm an oxygen enhancement for
stars belonging to the thick disk, as it has been seen also for other
alpha elements.
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