2006A&A...454..581D


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST09:04:16

2006A&A...454..581D - Astronomy and Astrophysics, volume 454, 581-593 (2006/8-1)

Abundance difference between components of wide binaries. II. The southern sample.

DESIDERA S., GRATTON R.G., LUCATELLO S. and CLAUDI R.U.

Abstract (from CDS):

We present high-precision iron abundance differences for 33 wide binaries with similar components. They were observed with the FEROS spectrograph at ESO, looking for abundance anomalies due to the ingestion of metal rich material of a planetary origin. An optimized data analysis technique and the high quality of the spectra allowed us to achieve an error of about 0.02 dex for pairs with small temperaure differences. We found one case (HIP 64030 = HD 113984) with a large (0.27dex) abundance difference. The primary of this binary appears to be a blue straggler, and the abundance difference might be due to the peculiar evolution of the star. A few other pairs show small abundance differences (≤0.09dex). In a few cases these differences suggest the ingestion of a small amount of metal rich material, but in others they are likely spurious, because of the large temperature difference, high level of magnetic activity, or different evolutionary phases between the components. Some cases of abundance differences involving pairs with warm (Teff≥6000K) primaries might be due to the diffusion of heavy elements; dedicated theoretical models for the stellar parameters of the targets would be welcome. This study confirms our preliminary result based on analysis of 23 pairs (Desidera et al., 2004A&A...420..683D) that the occurrence of large alterations in stellar abundances caused by the ingestion of metal rich, rocky material is not a common event. For at least 65% of the pairs with components warmer than 5500K, the limits on the amount of rocky material accreted by the program stars are comparable to the estimates of rocky material accreted by the Sun during its main-sequence lifetime.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: planetary systems - stars: binaries: visual - techniques: spectroscopic

VizieR on-line data: <Data not supplied by the author>

Simbad objects: 46

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Number of rows : 46

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME THA As* 00 00 -62.0           ~ 340 0
2 HD 4001 ** 00 41 59.79469 -55 46 55.6604   8.0 7.6     F6/8III/IV 20 1
3 HD 13357 ** 02 10 52.07912 +13 40 59.7887   8.35 7.65     G5IV 58 0
4 HD 13357A * 02 10 52.085 +13 40 59.73   8.88 8.20 8.75   dG4 33 0
5 HD 28255 ** 04 24 12.20665 -57 04 16.8262           G1V+G6V 54 0
6 HD 63581 PM* 07 46 14.8430539140 -59 48 50.634602772   8.92 8.14     K0IV-V(k) 34 0
7 HD 63608 PM* 07 46 16.9608861560 -59 48 34.194570827   9.06 8.23     K0IV-V(k) 46 0
8 HD 66491 ** 08 03 23.89032 -13 12 13.3058           G8/K1III+(F/G) 13 0
9 HD 78964 PM* 09 07 58.1743367723 -64 02 06.793211824   10.68 9.75     G6/K1(III) 30 0
10 HD 78977 PM* 09 07 59.6507697331 -64 02 02.492375374   10.29 9.47     G6/K1(III) 21 0
11 HD 87743B PM* 10 06 38.5743352800 -19 18 30.974345627   9.528 8.924 8.54 8.39 ~ 14 0
12 HD 87743 PM* 10 06 38.9547261854 -19 18 38.884782645   9.361 8.750 8.45 8.33 G5 25 0
13 HD 90885 ** 10 28 18.52252 -52 33 41.9830           K2/3III 20 0
14 HD 98427 ** 11 19 22.63950 -01 39 17.5965           G2V+G/K 26 0
15 * 17 Crt ** 11 32 16.40407 -29 15 39.6768           F8V+F8V 20 0
16 CCDM J11573-2232AB ** 11 57 18.4982645807 -22 32 17.491995042   7.6 7.3     F6V 23 1
17 HD 104760 PM* 12 03 46.2944066793 -44 07 22.103659522   8.68 8.07     G2/3III 42 0
18 HD 104759 PM* 12 03 47.7180072630 -44 07 04.676876650   9.49 8.75     G8/K0V 18 0
19 HD 104829 * 12 04 17.4685936759 +07 24 20.265788388   10.54 9.94     F8 9 0
20 HD 104830 * 12 04 18.4311902212 +07 23 56.655201404   9.65 9.16     F8 8 0
21 HD 106515 ** 12 15 06.56688 -07 15 26.3497           K0-V 53 0
22 HD 111484 ** 12 49 34.82247 +03 49 05.5567           F+F 29 0
23 HD 113984 ** 13 07 19.7044474 +00 35 05.842180           F5V 47 0
24 * 18 CVn * 13 11 28.6905809003 +40 47 32.989192187   8.11 7.16     G9III 18 0
25 HD 115863 ** 13 21 23.20903 -64 02 59.0843           G0V 25 0
26 HD 116442 PM* 13 23 39.1537725393 +02 43 23.978332588   7.83   6.5   G9V 91 0
27 HD 124054 ** 14 11 20.51688 -03 20 18.6769           F7/8V 26 0
28 HD 125906 ** 14 22 38.66102 -07 46 05.4321           F7/G0V+F7/G0 37 0
29 HD 126246 ** 14 24 05.76628 +11 14 49.0878           G0V 40 0
30 HD 133131 ** 15 03 35.80651 -27 50 27.5520   8.6 8.7     G2V+G2V 35 0
31 HD 134632 ** 15 11 32.8938886 -21 18 37.128870   9.56 9.00     F5V 7 0
32 HD 135101 PM* 15 12 43.4807787593 +19 17 09.741336182   7.36   6.2   G5V_Fe-0.9 147 0
33 HD 135101B PM* 15 12 43.7765882565 +19 17 32.778650241   8.26   6.8   G7V 85 0
34 HD 134655 * 15 12 45.3672635293 -46 53 44.516394736   9.75 8.80     G8/K0III 6 0
35 HD 138846 PM* 15 36 46.4520153746 -50 10 07.503433455   9.19 8.70     F8/G0V 8 0
36 HD 139460 * 15 38 39.9578979461 -08 47 40.994519983   7.03 6.50     F7V 55 0
37 HD 139461 SB* 15 38 40.0605002201 -08 47 29.205996075   7.00 6.48     F6.5V 62 0
38 HD 142661A PM* 15 55 54.585 -02 09 51.87   7.517 6.964 7.97   F8.5V 30 0
39 HD 146368 ** 16 17 26.95516 -34 49 09.2812           F6V+(G/K) 17 0
40 CD-29 12513 ** 16 24 39.77379 -29 42 16.7693           G0 25 0
41 HD 147723 PM* 16 24 39.7739000258 -29 42 16.785690252   6.41 5.82     F9IV 41 0
42 * 36 Oph ** 17 15 20.9839376 -26 36 10.157115           K2V+K1V 116 0
43 CCDM J20319-4054AB ** 20 31 52.73952 -40 54 06.0803   8.4 7.3     K0/2+F/G 26 1
44 HD 199065 ** 20 57 22.4358526 -59 04 33.474323           G2/5V+G: 29 0
45 HD 201796 ** 21 12 22.60579 -15 00 00.3673           G2/3V 33 0
46 HD 219542 ** 23 16 35.23827 -01 35 11.4798   8.25 7.59     G(5)+(A) 39 0

    Equat.    Gal    SGal    Ecl

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2020.07.05-09:04:16

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