2005A&A...429.1031B


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.23CEST16:06:45

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

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HE 0024-2523 Pe* 00 27 27.6485410349 -25 06 28.291081599 15.067 15.32 14.91     CEMP-s 65 0
2 BPS CS 31062-0050 Pe* 00 30 31.0633474070 -12 05 10.873150611   13.7 13.05 12.681 12.309 CEMP-r/s 60 0
3 SKB 2 Pe* 00 41 39.8197261334 -26 18 54.463949137   13.338 12.221 11.704 11.321 CEMP-s 84 0
4 SB 960 Pe* 00 44 03.5698517387 -13 55 26.270588506   12.69 12.15 11.806 11.483 CEMP-s 104 0
5 BPS CS 29526-0110 Pe* 03 27 43.6395462631 -23 00 29.931204041   13.71 13.35 13.116 12.834 CEMP-r/s 48 0
6 BPS CS 30301-0015 Pe* 15 08 56.8433023195 +02 30 18.628172611   14.04 13.04   12.063 CEMP-s 44 0
7 LP 625-44 Pe* 16 43 14.0364804654 -01 55 30.408914037   12.84 11.68     CEMP-s 102 0
8 HD 196944 Pe* 20 40 46.0790261041 -06 47 50.650812411   9.01 8.40 8.08   CEMP-s 90 0
9 BPS CS 22898-0027 Pe* 21 05 45.0995574992 -18 36 57.505496795   13.26 12.76 12.476 12.094 CEMP-r/s 80 0
10 HE 2134-3940 Pe* 21 37 45.7673672486 -39 27 22.314122762   13.790 12.660 12.160 11.760 KIIvw 82 0
11 HE 2148-1247 Pe* 21 51 17.9099257554 -12 33 41.560711332   15.2 14.79     CEMP-r/s 43 0

    Equat.    Gal    SGal    Ecl

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2021.04.23-16:06:45

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