2005A&A...441.1135J


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.29CET00:45:28

2005A&A...441.1135J - Astronomy and Astrophysics, volume 441, 1135-1148 (2005/10-3)

On metal-deficient barium stars and their link with yellow symbiotic stars.

JORISSEN A., ZACS L., UDRY S., LINDGREN H. and MUSAEV F.A.

Abstract (from CDS):

This paper addresses the question of why metal-deficient barium stars are not yellow symbiotic stars (YSyS). Samples of (suspected) metal-deficient barium (mdBa) stars and YSyS have been collected from the literature, and their properties reviewed. It appears in particular that the barium nature of the suspected mdBa stars needs to be ascertained by detailed abundance analyses. Abundances are therefore derived for two of them, HD 139409 and HD 148897, which reveal that HD 148897 should not be considered a barium star. HD 139409 is a mild barium star, with overabundances observed only for elements belonging to the first s-process peak (Y and Zr). It is only moderately metal-poor ([Fe/H]=-0.4). The evidence for binarity among mdBa stars is then reviewed, using three different methods: (i) radial-velocity variations (from CORAVEL observations), (ii) Hipparcos astrometric data, and (iii) a method based on the comparison between the Hipparcos and Tycho-2 proper motions. An orbit is obtained for HIP 55852, whereas evidence for the (so far unknown) binary nature of HIP 34795, HIP 76605, HIP 97874 and HIP 107478 is presented. No conclusion regarding the binary nature of HIP 11595, HIP 25161 could be reached. Two stars with no evidence for binarity whatsoever (HIP 58596 and BD +3°2688) are candidates low-metallicity thermally-pulsing asymptotic giant branch stars, as inferred from their large luminosities. The reason why mdBa stars are not YSyS is suggested to lie in their different orbital period distributions: mdBa stars have on average longer orbital periods than YSyS, and hence their companion accretes matter at a lower rate, for a given mass loss rate of the giant star. The definite validation of this explanation should nevertheless await the determination of the orbital periods for the many mdBa stars still lacking periods, in order to make the comparison more significant.

Abstract Copyright:

Journal keyword(s): binaries: symbiotic - stars: abundances - stars: AGB and post-AGB - binaries: spectroscopic

Simbad objects: 30

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Number of rows : 30

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 HD 5424 SB* 00 55 43.9269897905 -27 53 37.267085541   10.558 9.517 9.690   G8II 45 1
2 CD-26 304 Pe* 00 57 18.1376089543 -25 26 09.699477820   13.57 12.69 12.198 11.759 CEMP-s 62 1
3 V* V471 Per Al* 01 58 49.6642388419 +52 53 48.460982843   14.06 13.08     G2Ib 169 1
4 HD 15589 Pe* 02 29 26.5532471411 -36 08 58.785594617   10.13 8.97     G8II 27 0
5 EM* StHA 32 Sy* 04 37 45.6311522513 -01 19 11.896504207     13.5     C1,1e_CH5 31 0
6 CD-27 2233 Pe* 05 23 01.8323240327 -27 24 10.469278263   10.12 9.00     K1IIIBa5 18 0
7 HD 43389 SB* 06 15 47.0677782513 -02 23 08.220566157 11.26 9.80 8.32     K0/1IIICNIIp 41 1
8 HD 55496 Pe* 07 12 11.3777515932 -22 59 00.610613637   9.30 8.40     G(II)wp(Ba) 65 1
9 WRAY 15-157 Sy* 08 06 34.8732150919 -28 32 01.221459066   10.0 7.4     G5III 23 0
10 EM* AS 201 PN 08 31 42.8825036476 -27 45 31.541479213   13 11.80     F9III 87 0
11 BD+75 348 C* 08 46 11.6378906707 +74 32 31.237557585   10.63 9.54     C3,0_Ba4 37 0
12 BD+04 2466 PM* 11 26 49.1890409114 +03 51 51.646284678   11.22 10.67 10.45   KIIvw 69 0
13 V* TZ Crv LP* 12 00 57.2663387395 -21 15 02.778916850 10.82 9.55 8.14     G6/8IIICNII 37 0
14 BD+03 2688 PM* 12 44 07.7482993341 +02 44 37.938646350   11.60 10.55     M0 12 0
15 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2151 0
16 SV* HV 6516 LP* 14 15 59.6788456205 -61 53 50.268159401     12.00     F6V 39 0
17 BD-21 3873 Sy* 14 16 34.2916048270 -21 45 50.037192663   12.060 10.684     K2e 70 0
18 HD 123396 Pe* 14 17 31.5591919267 -83 32 52.136247808   10.14 8.96     G8/K0II/IIIp 32 0
19 HD 139409 Pe* 15 38 41.3889514443 -17 39 53.589702795   8.20 7.13     G8II/III 40 1
20 HD 330036 Em* 15 51 15.92914 -48 44 58.5409   13.09 11.28     F5III-IV 152 1
21 V* AG Dra Sy* 16 01 41.0125687664 +66 48 10.131181273 11.50 11.06 9.74 8.52   K3IIIep 477 0
22 NAME UKS-Ce1 Sy* 16 15 29.6279771715 -22 12 15.560438504       15.51 14.19 C4,5Je_CH4 29 0
23 * s Her PM* 16 30 33.5485765867 +20 28 45.068186901   6.484 5.243     G8.5IIICN-2CH-1Fe-1 126 0
24 Hen 3-1591 Sy* 18 07 32.0162055140 -25 53 43.326635637   13.0 12.0     K1III: 39 0
25 HD 187762 * 19 53 20.6416517545 -40 22 20.130762779   10.04 8.95     G8II/III 14 1
26 V* LT Del Sy* 20 35 57.2353984617 +20 11 27.504214453           G6III 96 1
27 CD-43 14304 Sy* 21 00 06.3577224043 -42 38 44.938778022     11.0     K7e 54 0
28 HE 2134-3940 Pe* 21 37 45.7673672486 -39 27 22.314122762   13.790 12.660 12.160 11.760 KIIvw 81 0
29 EM* StHA 190 Sy* 21 41 44.8880611733 +02 43 54.409367196   11.13 10.22     G5e 41 0
30 HD 206983 Pe* 21 46 09.3424956829 -15 14 39.768971268   11.1 9.45     GpBa 39 1

    Equat.    Gal    SGal    Ecl

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2020.11.29-00:45:28

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