Abstract
It is now widely recognised that peculiar red giants such as S stars are overgrown with “extrinsic” stars. Those binary masqueraders share the same abundance peculiarities as the prototypes of their spectral family (as judged from low-resolution spectra), but have a totally different evolutionary history (chemical peculiarities originating from mass transfer across a binary system instead of internal nucleosynthesis). Some characteristic properties of these extrinsic stars are investigated and the importance of un-masking them in stellar population studies is stressed.
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Van Eck, S., Jorissen, A. (2001). Chemically-Peculiar Red Giants: Uncovering the Binary Intruders. In: Vanbeveren, D. (eds) The Influence of Binaries on Stellar Population Studies. Astrophysics and Space Science Library, vol 264. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9723-4_8
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DOI: https://doi.org/10.1007/978-94-015-9723-4_8
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