New analysis of the two carbon-rich stars CS 22948-27 and CS 29497-34 : binarity and neutron-capture elements

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dc.creatorBarbuy, B.
dc.creatorSpite, M.
dc.creatorSpite, F.
dc.creatorHill, V.
dc.creatorCayrel, R.
dc.creatorPlez, B.
dc.creatorPetitjean, P.
dc.date2004-09-09
dc.date.accessioned2026-07-07T02:14:32Z
dc.date.available2026-07-07T02:14:32Z
dc.descriptionWe have carried out a new determination of abundances in the very metal-poor CH/CN strong stars CS 29497-34 and CS 22948-27, using high-resolution spectra obtained with the HARPS spectrograph at the 3.6m telescope of ESO, La Silla, that covers the range 400 - 690 nm at a resolution of R = 100,000. Both stars are found to be long period binaries. It is confirmed that the abundance patterns show an enhancement of all the alpha-elements (like Mg, Ca), of the proton capture elements (like Na and Al) and a strong enrichment in "r" and "s" process elements, where the s-enrichment is probably due to a mass transfer episode from a companion in its AGB phase. The possible origins of the abundance pattern and especially of the strong enhancement of both "s" and "r" elements are discussed.
dc.description12 pages, 11 Postscript figures, accepted for publication in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0409213
dc.identifierhttp://arxiv.org/abs/astro-ph/0409213
dc.identifierAstron.Astrophys. 429 (2005) 1031
dc.identifierdoi:10.1051/0004-6361:20040415
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/8148
dc.subjectAstrophysics
dc.titleNew analysis of the two carbon-rich stars CS 22948-27 and CS 29497-34 : binarity and neutron-capture elements
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