POSTER PAPER 2.13
Beryllium Abundances in Stars Hosting Planets
R. J. Garcia Lopez, N. C. Santos, G. Israelian, M. Mayor, R. Rebolo, A. Garcia Gil, M. R. Perez de Taoro, and S. Randich
Institute: Instituto de Astrofisica de Canarias, Spain
Institute: Departamento de Astrofisica, Universidad de La Laguna, Spain
Institute: Observatoire de Geneve, Switzerland
Institute: Consejo Superior de Investigaciones Cientificas, Spain
Institute: Osservatorio Astrofisico di Arcetri, Italy
Contact Email: rgl@ll.iac.es
Abstract:
Very valuable information can be obtained by studying surface
chemical abundances in stars with orbiting planets.
Possible interactions between extrasolar planets and their parent
stars can be studied using light elements as lithium and beryllium,
which are excellent tracers of mixing mechanisms operating in the
stellar interior. A wide sample of stars hosting planets, with
spectral types in the range F7V-K0V, have been observed and their
beryllium abundances derived to study in detail the effects of
planets on the structure and evolution of their associated stars.
Preliminary results suggest that either low-mass planet hosts are
anomalously beryllium depleted stars, or theoretical evolutionary
models have to be revised for stars with effective temperatures below
~5600 K.
Index Keywords: Stars: Abundances; Stars: Evolution, Planetary Systems
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Manuscript submitted: 2001-Sep-08
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown,
G. M. Harper, & T. R. Ayres.
Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems,
& The Sun,
© 2003 University of Colorado.