237 citations · 744 across the 11 of their papers we have counts for
9 papers · 1 filter
The CODEX-ESPRESSO experiment: cosmic dynamics, fundamental physics, planets and much more..
S. Cristiani, G. Avila, P. Bonifacio +36
CODEX, a high resolution, super-stable spectrograph to be fed by the E-ELT, the most powerful telescope ever conceived, will for the first time provide the possibility of directly…
UVES radial velocity accuracy from asteroid observations. Implications for the fine structure constant variability
P. Molaro, S. A. Levshakov, S. Monai +4
High resolution observations of the asteroids Iris and Juno have been performed by means of the UVES spectrograph at the ESO VLT to obtain the effective accurac y of the spectrogra…
A new measure of Delta alpha/alpha at redshift z = 1.84 from very high resolution spectra of Q1101-264
S. A. Levshakov, P. Molaro, S. Lopez +5
We probe the evolution of the fine-structure constant, alpha, with cosmic time. Accurate positions of the FeII lines 1608, 2382,and 2600 A are measured in the z = 1.84 absorption s…
The exotic chemical composition of the Sagittarius dwarf Spheroidal galaxy
L. Sbordone, P. Bonifacio, R. Buonanno +3
The Sagittarius dwarf Spheroidal galaxy is the nearest neighbor of the Milky Way. Moving along a short period quasi-polar orbit within the Halo, it is being destroyed by the tidal…
Cu and Zn in the early Galaxy
G. Bihain, G. Israelian, R. Rebolo +2
We present Cu and Zn abundances for 38 FGK stars, mostly dwarfs, spanning a metallicity range between solar and [Fe/H] =-3. The abundances were obtained using Kurucz's local therma…
An astrophysical oscillator strength for the SII 94.7 nm resonance line and S abundances in DLAs
P. Bonifacio, E. Caffau, M. Centurion +2
By using UV spectra for the O star HD 93521 taken with the ORFEUS II echelle spectrograph, we determine an ``astrophysical'' f value for the SII 94.7 nm line: f = 0.00498 (+0.00172…
Molecular hydrogen abundance in the dust-free damped Ly-alpha galaxy at z = 3.4
S. A. Levshakov, P. Molaro, M. Centurion +3
New results from the search for H2 absorption in the damped Ly-alpha galaxy at redshift z = 3.4 toward QSO 0000-2620 (z_em = 4.1) are reported. The high-resolution (lambda/Delta la…
The INT Search for Metal-Poor Stars. Spectroscopic Observations and Classification via Artificial Neural Networks
C. Allende Prieto, R. Rebolo, R. J. Garcia Lopez +5
With the dual aims of enlarging the list of extremely metal-poor stars identified in the Galaxy, and boosting the numbers of moderately metal-deficient stars in directions that sam…
Abundances of metal-weak thick-disc candidates
P. Bonifacio, M. Centurion, P. Molaro
High resolution spectra of 5 candidate metal-weak thick-disc stars suggested by Beers & Sommer-Larsen (1995) are analyzed to determine their chemical abundances. The low abundance…