Abstract
In order to investigate the dependence of planet formation on stellar mass, we have been monitoring a sample of F-type main-sequence stars with the 2.0 m Alfred-Jensch telescope of the Thuringer Landessternwarte Tautenburg. This survey is based on high-precision radial velocity (RV) measurements using the coude echelle spectrograph and an iodine absorption cell. We present RV measurements of the F7 V star HD 8673 that show a long-term variability of 1634 days with a semi-amplitude K = 288 m s-1 that can be explained most reasonably by an orbiting sub-stellar companion with a minimum mass of 14.2 M Jup in a high-eccentricity (e = 0.723) Keplerian orbit.
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