Parent stars of extrasolar planets. V. HD 75289

摘要

The results of a new spectroscopic analysis of HD 75289, recently reported to harbor a Jovian-mass planet, are presented. From high-resolution, high signal-to-noise ratio spectra, we derive Fe/H = + 0.28 +/- 0.05 for this star, in agreement with the spectroscopic study of Gratton et al. published 10 years ago. In addition, we present a reanalysis of the spectra of upsilon And and tau Boo; our new parameters for these two stars are now in better agreement with photometrically derived values and with the recent spectroscopic analyses of Fuhrmann et al. We also report on extended abundance analyses of 14 Her, HD 187123. HD 210277, and rho(1) Cnc. If we include the recent spectroscopic analyses of HD 217107 by Randich et al. and Sadakane et al., who both reported Fe/H similar to +0.30 for this star, we can state that all the "hot-Jupiter" systems studied to date have metal-rich parent stars. We find that the mean C/Fe and Na/Fe values among the sample of stars with planets are smaller than the corresponding quantities among held stars of the same Fe/H. References: 31