136 citations · 287 across the 7 of their papers we have counts for
7 papers
Fundamental constants and high resolution spectroscopy
P. Bonifacio, H. Rahmani, J. B. Whitmore +14
Absorption-line systems detected in high resolution quasar spectra can be used to compare the value of dimensionless fundamental constants such as the fine-structure constant, alph…
Metals in the IGM approaching the re-ionization epoch: results from X-shooter at the VLT
V. D'Odorico, G. Cupani, S. Cristiani +15
We present the results of observations taken with the X-shooter spectrograph devoted to the study of quasars at z ~ 6. This paper focuses on the properties of metals at high redshi…
Calibration issues in estimating variability of the fine structure constant (alpha) with cosmic time
Miriam Centurión, Paolo Molaro, Sergei Levshakov
Laser Comb Wavelength calibration shows that the ThAr one is locally unreliable with possible deviations of up to 100 m/s within one order range, while delivering an overall 1 m/s…
The lithium content of the globular cluster NGC 6397
P. Bonifacio, L. Pasquini, F. Spite +16
We make use of high resolution, high signal-to-noise ratio spectra of 12 turn-off stars in the metal-poor globular cluster NGC 6397 to measure its lithium content. We conclude that…
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…