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Astron. Astrophys. 336, 942-952 (1998)


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F- and G-type stars with planetary companions: Andromedae, 1 Cancri, Bootis, 16 Cygni and  Coronae Borealis *

Klaus Fuhrmann, Michael J. Pfeiffer and Jan Bernkopf

Institut für Astronomie und Astrophysik der Universität München, Scheinerstraße 1, D-81679 München, Germany

Received 25 March 1998 / Accepted 15 April 1998

Abstract

Accurate stellar parameters are presented for the F- and G-type stars [FORMULA]And, [FORMULA] Cnc, [FORMULA]Boo, 16 Cyg, and [FORMULA] CrB, which are deemed to possess planetary companions from intense Doppler monitoring. Evolutionary tracks that employ detailed model atmospheres as upper boundary condition and allow for helium diffusion are computed for the individual stars to derive the stellar masses and ages. From a comparison of the spectroscopic parallaxes with the accurate distances available from the Hipparcos satellite well-defined constraints on the stellar surface gravities are obtained in good agreement with our spectroscopically deduced values.

Key words: stars: distances – stars: evolution – stars: fundamental parameters – stars: planetary systems

* Based on observations collected at the German Spanish Astronomical Center, Calar Alto, Spain

© European Southern Observatory (ESO) 1998

Online publication: July 27, 1998

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