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05 November 2024
 
  » arxiv » astro-ph/0510424

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Extrasolar planets and brown dwarfs around A-F type stars III. Beta-Pictoris : looking for planets, finding pulsations
F. Galland ; A. M. Lagrange ; S. Udry ; A. Chelli ; F. Pepe ; J. L. Beuzit ; M. Mayor ;
Date 14 Oct 2005
AbstractIn the frame of the search for extrasolar planets and brown dwarfs around early-type stars, we present the results obtained on Beta-Pictoris, which is surrounded by a circumstellar disk that is warped by the presence of a planet. We used 97 spectra acquired with CORALIE and 230 spectra acquired with HARPS to characterize the radial velocity behavior of Beta-Pictoris and to infer constraints on the presence of a planet close to this star. With these data, we were able to exclude the presence of an inner giant planet (2 MJup at a distance to the star of 0.05 AU, 9 MJup at 1 AU). We also discuss the origin of the observed radial velocity variations in terms of Delta-Scuti type pulsations.
Source arXiv, astro-ph/0510424
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