EDP Sciences
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Volume 384, Number 3, March IV 2002
Page(s) 879 - 883
Section Galactic structure and dynamics
DOI http://dx.doi.org/10.1051/0004-6361:20020011

A&A 384, 879-883 (2002)
DOI: 10.1051/0004-6361:20020011

Galactic orbits of stars with planets

M. Barbieri1 and R. G. Gratton2

1  Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, 35122 Padova, Italy
    e-mail: barmau@pd.astro.it
2  Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy
    e-mail: gratton@pd.astro.it

(Received 7 August 2001 / Accepted 5 December 2001 )

We have reconstructed the galactic orbits of the parent stars of exoplanets. For comparison, we have recalculated the galactic orbits of stars from the Edvardsson et al. (1993) catalog. A comparison between the two samples indicates that stars with planets are not kinematically peculiar. At each perigalactic distance stars with planets have a metallicity systematically larger than the average for the comparison sample. We argue that this result favors scenarios where the presence of planets is the cause of the higher metallicity of stars with planets.

Key words: stars: planetary systems -- stars: abundances

Offprint request: M. Barbieri, barmau@pd.astro.it

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