Browsing by Author "Bonifacio, P."

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    • A new measure of Delta alpha/alpha at redshift z=1.84 from very high resolution spectra of Q 1101-264 
      Levshakov, S. A.; Molaro, P.; López, S.; D'Odorico, S.; Centurión, M.; Bonifacio, P.; Agafonova, I. I.; Reimers, D. (2007)
      Aims. We probe the evolution of the fine-structure constant a with cosmic time. Methods. Accurate positions of the Fe II lines lambda 1608, lambda 2382, and lambda 2600 are measured in the z(abs) = 1.84 absorption system ...
    • Three planetary companions around M67 stars 
      Brucalassi, A.; Pasquini, L.; Saglia, R.; Ruiz González, María Teresa; Bonifacio, P.; Bedin, L. R.; Biazzo, K.; Melo, C.; Lovis, C.; Randich, S. (ESO, 2014)
      For the past six years we have carried out a search for massive planets around main sequence and evolved stars in the open cluster M67, using radial velocity (RV) measurements obtained with HARPS at ESO (La Silla), SOPHIE ...