Poster Open Access
Mishenina Tamara; Basak Nina; Adibekyan Vardan; Soubiran Caroline; Kovtyukh Valery
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 iron abundance [Fe/H] and key elements (Li, C, O, Mg, Si) indicative of the planet formation, as well as the dependencies of [El/Fe] on the condensation temperature (Tcond), 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, slightly lower than 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; various slopes of [El/Fe] versus Tcond. The dependencies of the planetary mass on metallicity, the lithium abundance, the C/O and Mg/Si ratios, and also on the [El/Fe]--Tcond slopes were considered.