Chemical imprints in atmospheric abundances of stars with massive planets

Stellar parameters of 25 stars with detected massive planets and abundances of 25 elements 
from Li to  Eu were investigated based on homogeneous high resolution spectra. The abundance of iron 
 [Fe/H] and key  elements (Li, C, O, Mg and Si), indicative of the planet formation,  as 
well as the dependencies of [El/Fe] on the condensation temperature ($T_{cond}$), were analyzed. 
We found some interesting results:  the  mean values of C/O and [C/O] are $<$C/O$>$  = 0.48 
±0.07 and $<$[C/O]$>$ = -0.07 ±0.07, they are slightly lower than the solar ones; the Mg/Si ratios range 
from 0.83 to 0.95 for four stars in our sample  and from 1.0 to 1.86 for the remaining 21 stars; 
there are various slopes of [El/Fe] versus $T_{cond}$. The dependencies of the planetary mass on 
metallicity, Li abundance, C/O and Mg/Si ratios and also on the [El/Fe]--$T_{cond}$ 
slopes were examined.