Abundances of refractory elements in the atmospheres of stars with extrasolar planets

  title={Abundances of refractory elements in the atmospheres of stars with extrasolar planets},
  author={Gabriella Gilli and Garik Israelian and A. Ecuvillon and Nuno C. Santos and Massimo della Valle Dipartimento di Astronomia and Universit̀a di Padova and Italy. and Iac and Spain. and Observatorio Astronomico de Lisboa and Portugal and Observatoire de Geneve and Switzerland.},
  journal={Astronomy and Astrophysics},
Aims. This work presents a uniform and homogeneous study of chemical abundances of refractory elements in 101 stars with and 93 without known planetary companions. We carry out an in-depth investigation of the abundances of Si, Ca, Sc, Ti, V, Cr, Mn, Co, Ni, Na, Mg and Al. The new comparison sample, spanning the metallicity range -0.70 < [Fe/H] < 0.50, fills the gap that previously existed, mainly at high metallicities, in the number of stars without known planets. Methods. We used an enlarged… 


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