Abstract
Double lined spectroscopic binaries in an evolved stage of evolution are expected to be extremely rare since they must consist of equally luminous and thus almost equally evolved objects, which requires an extremely similar initial mass. In this contribution we discuss such rare double evolved SB2 system: HD 172481. This binary includes an F-type post-AGB object and an M-type AGB companion. The spectrum shows a surprisingly strong Li I 670.8 nm line with an equivalent width of Wλ = 54 mÅ, yielding a lithium abundance of log є(Li) = 3.6. Several explanations for this huge lithium content are explored.
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© 2001 Springer Science+Business Media Dordrecht
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Reyniers, M., van Winckel, H. (2001). The Very Lithium Rich Post-AGB SB2 Binary HD 172481. In: Szczerba, R., Górny, S.K. (eds) Post-AGB Objects as a Phase of Stellar Evolution. Astrophysics and Space Science Library, vol 265. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9688-6_43
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DOI: https://doi.org/10.1007/978-94-015-9688-6_43
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-5758-7
Online ISBN: 978-94-015-9688-6
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