A carbon rich star BD +75deg 348: a binary?

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Stars: Evolution, Stars: Abundances, Stars: Chemically Peculiar, Stars: Individual: Bd +75O348

Scientific paper

An LTE abundance analysis of the ``CH-like" star BD +75deg 348, with an unknown evolutionary status, is presented based on high resolution, high signal-to-noise spectra. With [C/Fe] = +0.5 dex and a mean s-process overabundance of [s/Fe] =~ +1.6 dex the peculiar atmospheric composition of BD +75deg 348 is confirmed. The modest iron deficiency, [Fe/H] = -0.8, and the kinematic data support the idea that BD +75deg 348 is an old disk population object. Possible evolutionary stages, that can explain its atmospheric parameters and peculiar chemical composition, are discussed.

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