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astro-ph2003★ 4 cited
Search for alpha variation in UVES spectra: Analysis of C IV and Si IV doublets towards QSO 1101-264
A. F. Martinez Fiorenzano, G. Vladilo, P. Bonifacio
Motivated by previous studies of QSO spectra that reported a variation of the fine structure constant alpha, a search for C IV and Si IV doublets was conducted in the absorption sp…
astro-ph2003
A common trend in the chemical evolution of Local Group dwarf spheroidals and Damped Ly-alpha systems
G. Vladilo, L. Sbordone, P. Bonifacio
We compare chemical abundances of Local Group dwarf spheroidals, obtained from recent UVES/VLT observations, and of high redshift Damped Lyman alpha systems (DLAs), corrected for d…