Volume 551, March 2013
|Number of page(s)||7|
|Section||Stellar structure and evolution|
|Published online||20 February 2013|
Eccentricity-pumping in post-AGB stars with circumbinary discs
Argelander-institut für Astronomie, University of Bonn,
Auf dem Hügel 71,
2 Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles, Belgium
3 Instituut voor Sterrenkunde, K.U. Leuven, Belgium
Received: 17 April 2012
Accepted: 7 December 2012
Circumbinary discs are commonly observed around post-asymptotic giant branch (post-AGB) systems and are known to play an important role in their evolution. Several studies have pointed out that a circumbinary disc interacts through resonances with the central binary and leads to angular momentum transfer from the central binary orbit to the disc. This interaction may be responsible for a substantial increase in the binary eccentricity. We investigate whether this disc eccentricity-pumping mechanism can be responsible for the high eccentricities commonly found in post-AGB binary systems.
Key words: binaries: general / stars: AGB and post-AGB / stars: chemically peculiar / Galaxy: stellar content
© ESO, 2013
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