Astron. Astrophys. 332, 842-844 (1998)

Research Note

On the planetary companions of solar-type stars

Jií Kubát ¹, David Holmgren ¹ and Inga Rentzsch-Holm <sup>2

1</sup> Astronomický ústav, Akademie vd eské republiky, CZ-251 65 Ondejov, Czech Republic
² Institut für Astronomie und Astrophysik der Universität Kiel, D-24098 Kiel, Germany

Received 2 October 1997 / Accepted 9 December 1997

Abstract

The problem of planets around solar type stars is reinvestigated using model stellar atmospheres and synthetic spectra. It is shown that a possible stellar companion may be spectroscopically well hidden. The changes in the corresponding line profile shapes are too small to be seen. Consequently, an erroneous classification of such secondary as a planet is possible.

Key words: stars: binaries: spectroscopic stars: late-type stars: low-mass, brown dwarfs stars: planetary systems

Send offprint requests to: J. Kubát

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Contents

• 1. Introduction
• 2. Model atmospheres and synthetic spectra
• 3. Cross-correlation technique
• 4. Discussion
• 5. Conclusion
• Acknowledgements
• References

© European Southern Observatory (ESO) 1998

Online publication: March 30, 1998
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