Accurate LTE abundances for some lambda Boo stars
  High-resolution and high S/N CCD spectra were analyzed to determine accurate LTE abundances in four lambda Boo stars: pi^1 Ori, 29 Cyg, HR 8203 and 15 And. In general, 14 chemical elements were investigated. The main results are the following: all stars have a strong deficiency of the majority of investigated metals. Oxygen exhibits a moderate deficiency. The carbon abundance is close to the solar one.   The results obtained support an accretion/diffusion model, which is currently adopted for the explanation of the lambda Boo phenomenon. 
S.M. Andrievsky (1), I.V. Chernyshova (1), V.G. Klochkova (2), V.E.   Panchuk (2) ((1) Odessa State University, (2) SAO, Russia)