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The O-Na and Mg-Al Anticorrelations in Turn-Off and early Subgiants in Globular Clusters
R. G. Gratton, P. Bonifacio, A. Bragaglia +16
High dispersion spectra (R>40,000) for a quite large number of stars at the main sequence turn-off and at the base of the subgiant branch in NGC6397 and NGC6752 were obtained with…
UVES observations of QSO 0000-2620: Argon and Phosphorus abundances in the dust-free damped Ly-alpha system at zabs = 3.3901
Paolo Molaro, Sergei A. Levshakov, Sandro D'Odorico +2
The UV resonance transitions of neutral argon ArI 1066 A, and of singly ionized phosphorus PII 963 A, originated in the damped Ly_alpha system (DLA) at zabs = 3.3901 towards QSO 00…
First UVES observations of beryllium in very metal-poor stars
Francesca Primas, Paolo Molaro, Piercarlo Bonifacio +1
We report on a attempt to detect beryllium in two dwarf stars of the Galactic halo with metallicities below one thousandth solar. The data were obtained during the Commissioning of…
Intrinsic colour calibration for F, G, K stars
Piercarlo Bonifacio, Elisabetta Caffau, Paolo Molaro
We derive an intrinsic colour calibration for F--K stars using broad band Johnson colours and line indices KP and HP2. Through this calibration we can determine E(B-V) of an indivi…
Zinc as a tracer of metallicity evolution of Damped Lyman alpha systems
Giovanni Vladilo, Piercarlo Bonifacio, Miriam Centurion +1
Zinc is a good indicator of metallicity in Damped Lyman alpha (DLA) systems because it is almost unaffected by dust depletion. However, the use of zinc as a tracer of metallicity e…
First results of UVES at VLT: abundancesin the Sgr dSph
Piercarlo Bonifacio, Vanessa Hill, Paolo Molaro +3
Two giants of the Sagittarius dwarf spheroidal have been observed with the UVES spectrograph on the ESO 8.2m Kueyen telescope, during the commissioning of the instrument. Sgr 139 h…