Journal: Astronomy and Astrophysics

  • Publication
    Chemical abundances of 451 stars from the HARPS GTO planet search program. Thin disc, thick disc, and planets
    We present a uniform study of the chemical abundances of 12 elements (Si, Ca, Sc, Ti, V, Cr, Mn, Co, Ni, Na, Mg, and Al) derived from the spectra of 451 stars...
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    Chemical abundances of distant extremely metal-poor unevolved stars
    Context. The old Galactic halo stars hold the fossil record of the interstellar medium chemical composition at the time of their formation. Most of the stars...
  • Publication
    Chemical abundances of late-type pre-main sequence stars in the σ Orionis cluster
    Context: The young σ Orionis cluster is an important location for studying the formation and evolution of stars, brown dwarfs, and planetary-mass objects. Its...
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    Chemical abundances of planet-host stars. Results for alpha and Fe-group elements
    In this paper, we present a study of the abundances of Si, Ca, Sc, Ti, V, Cr, Mn, Co, and Ni in a large set of stars known to harbor giant planets, as well as...
  • Publication
    Chemical abundances of Planetary Nebulae in M 33
    Using spectroscopic data presented in Magrini et al. (cite{m03}), we have analyzed with the photoionization code CLOUDY 94.00 (Ferland et al. cite{ferland}) 11...
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    Chemical abundances of stars with brown-dwarf companions
    Context. It is well known that stars with giant planets are, on average, more metal-rich than stars without giant planets, whereas stars with detected low-mass...
  • Publication
    Chemical analysis of 8 recently discovered extra-solar planet host stars
    We present the chemical analysis of a new set of stars known to harbor low mass companions, namely HD 1237, HD 52265, HD 82943, HD 83443, HD 169830, and HD...
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    Chemical analysis of very metal-poor turn-off stars from SDSS-DR12
    Context. The most metal-poor stars are the relics of the early chemical evolution of the Galaxy. Their chemical composition is an important tool to constrain...
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    Chemical behavior of the dwarf irregular galaxy NGC6822. Its PN and HII region abundances
    Aims: We aim to derive the chemical behavior of a significant sample of PNe and HII regions in the irregular galaxy NGC 6822. The selected objects are...