SIMBAD references

2005A&A...429.1031B - Astronomy and Astrophysics, volume 429, 1031-1042 (2005/1-3)

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

BARBUY B., SPITE M., SPITE F., HILL V., CAYREL R., PLEZ B. and PETITJEAN P.

Abstract (from CDS):

We have carried out a new determination of abundances in the very metal-poor CH/CN strong stars CS 22948-27 and CS 29497-34, using high-resolution spectra obtained with the HARPS spectrograph at the 3.6m telescope of ESO, La Silla, that covers the range λλ4000-6900Å at a resolution of R=100000. Both stars are found to be long period binaries. It is confirmed that the abundance patterns show an enhancement of the α-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.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: population II - stars: carbon - stars: binaries: spectroscopic - Galaxy: bulge - nuclear reactions, nucleosynthesis, abundances

Simbad objects: 11

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2005A&A...429.1031B and select 'bookmark this link' or equivalent in the popup menu


2021.05.11-07:32:06

© Université de Strasbourg/CNRS

    • Contact