| Issue |
A&A
Volume 512, March-April 2010
|
|
|---|---|---|
| Article Number | A42 | |
| Number of page(s) | 5 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361/200913013 | |
| Published online | 26 March 2010 | |
Spectroscopic search for g-mode pulsations in ψ Centauri
INAF-Osservatorio Astronomico di Brera,
via E. Bianchi 46, 23807 Merate (LC), Italy e-mail: luciano.mantegazza@brera.inaf.it
Received:
29
July
2009
Accepted:
15
December
2009
Context. Prior analysis of the light curve of the eclipsing binary ψ Cen has shown the possible presence of g-mode pulsations.
Aims. We will try to confirm this claim by means of the analysis of high-resolution and high signal-to-noise echelle spectrograms.
Methods. We studied both the radial velocity curve and the line profile variations of ψ Cen.
Results. We obtained accurate measurements of the masses and radii of the two components. Regarding the study of pulsations, the orbital motion of the stars can explain all the observed variations in the spectrograms.
Conclusions. There is no evidence of g-mode pulsations in ψ Cen in the spectroscopic data.
Key words: binaries: eclipsing / stars: oscillations / stars: fundamental parameters / line: profiles / technique: spectroscopic
© ESO, 2010
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