2009A&A...496..791P


Query : 2009A&A...496..791P

2009A&A...496..791P - Astronomy and Astrophysics, volume 496, 791-804 (2009/3-4)

High-resolution spectroscopic observations of two chemically peculiar metal-poor stars: HD 10613 and BD+04°2466.

PEREIRA C.B. and DRAKE N.A.

Abstract (from CDS):

We determined the atmospheric parameters and abundance pattern of two chemically peculiar metal-poor stars: HD 10613 and BD+04°2466 in order to better understand their evolutionary state and the nature of the s-element enhancement of these stars. We used high resolution optical spectroscopy. Atmospheric parameters and abundances were determined in the local-thermodynamic-equilibrium model atmospheres of Kurucz using the spectral analysis code MOOG. We conclude that HD 10613 is another metal-poor barium star with C/O=0.52 and [Fe/H]=-0.82, while BD+04°2466 is a CH star with C/O=3.6 and [Fe/H]=-1.92 rather than a metal-deficient barium star as it was previously classified. BD+04°2466 appears to be enriched in lead with [Pb/Ce]=+0.85 and [Pb/La]=+0.72. For BD+04°2466 the abundance of lead is in agreement with predictions from AGB models. Due to the low luminosity of these two stars, their observed s-process overabundance is better explained by mass-transfer in the past from an AGB star.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: chemically peculiar - stars: binaries: general

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HE 0024-2523 Pe* 00 27 27.6486469632 -25 06 28.289948508 15.067 15.32 14.91     CEMP-s 67 0
2 CD-24 266 BS* 00 40 47.9313619824 -24 07 34.183333668   12.955 12.656 12.441 12.216 CEMP-s 93 0
3 SKB 2 Pe* 00 41 39.8197621944 -26 18 54.460585116   13.338 12.221 11.704 11.321 CEMP-s 88 0
4 CD-26 304 Pe* 00 57 18.1374361752 -25 26 09.696130944   13.57 12.69 12.198 11.759 CEMP-s 70 1
5 HD 10613 Pe* 01 42 45.0617601336 -38 00 19.052725392   10.61 9.58     G8IIIp 30 0
6 * del Eri * 03 43 14.9005379551 -09 45 48.210955899 5.13 4.46 3.54 2.82 2.32 K0+IV 574 0
7 BD+75 348 C* 08 46 11.6352830712 +74 32 31.232954292   10.63 9.54     C3,0_Ba4 38 0
8 BD+04 2466 PM* 11 26 49.1891119944 +03 51 51.641714700   11.22 10.67 10.45   KIIvw 72 0
9 V* V816 Cen dS* 11 37 37.0409608152 -46 42 34.877876832 8.99 8.79 8.03     F8/G0p 308 0
10 V* TZ Crv LP* 12 00 57.2664523464 -21 15 02.782558080 10.82 9.55 8.14     G6/8IIICNII 39 0
11 BD+03 2688 PM* 12 44 07.7483908512 +02 44 37.936148784   11.60 10.55     M0 14 0
12 BPS CS 22964-0161 SB* 20 03 25.5363989280 -38 38 35.322004572   14.9 14.41 14.63   CEMP-s 42 0
13 HE 2134-3940 Pe* 21 37 45.7673945880 -39 27 22.313379600   13.790 12.660 12.160 11.760 KIIvw 84 0
14 HD 206983 Pe* 21 46 09.3423868872 -15 14 39.766213896   11.1 9.45     GpBa 42 1

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2022.08.18-04:35:21

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