Eccentricity-pumping in post-AGB stars with circumbinary discs

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 tra...

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Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 2013-03, Vol.551, p.1-7
Main Authors: Dermine, T., Izzard, R. G., Jorissen, A., Van Winckel, H.
Format: Article
Language:English
Subjects:
Angular momentum
Astronomy
binaries: general
Binary systems
Discs
Disks
Eccentricity
Evolution
Galaxy: stellar content
Orbits
stars: AGB and post-AGB
stars: chemically peculiar
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Summary: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.
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361/201219430