J/MNRAS/459/4299 Barium stars abundances and kinematics (de Castro+, 2016)
Chemical abundance and kinematics of barium stars.
de Castro D.B, Pereira C.B, Roig F, Jilinski E, Drake N.A, Chavero C.,
Sales Silva J.V
<Mon. Not. R. Astron. Soc. 459, 4299 (2016)>
=2016MNRAS.459.4299D 2016MNRAS.459.4299D (SIMBAD/NED BibCode)
ADC_Keywords: Stars, peculiar ; Abundances
Keywords: stars: abundances - stars: AGB and post-AGB -
stars: chemically peculiar - stars: evolution -
stars: fundamental parameters - stars: binaries
Abstract:
In this paper, we present an homogeneous analysis of photospheric
abundances based on high-resolution spectroscopy of a sample of 182
barium stars and candidates. We determined atmospheric parameters,
spectroscopic distances, stellar masses, ages, luminosities and
scaleheight, radial velocities, abundances of the Na, Al,
α-elements, iron-peak elements, and s-process elements Y, Zr,
La, Ce, and Nd. We employed the local thermodynamic equilibrium model
atmospheres of Kurucz and the spectral analysis code MOOG. We found
that the metallicities, the temperatures and the surface gravities for
barium stars cannot be represented by a single Gaussian distribution.
The abundances of α-elements and iron peak elements are similar
to those of field giants with the same metallicity. Sodium presents
some degree of enrichment in more evolved stars that could be
attributed to the NeNa cycle. As expected, the barium stars show
overabundance of the elements created by the s-process. By measuring
the mean heavy-element abundance pattern as given by the ratio [s/Fe],
we found that the barium stars present several degrees of enrichment.
We also obtained the [hs/ls] ratio by measuring the photospheric
abundances of the Ba-peak and the Zr-peak elements. Our results
indicated that the [s/Fe] and the [hs/ls] ratios are strongly
anticorrelated with the metallicity. Our kinematical analysis showed
that 90 per cent of the barium stars belong to the thin disc
population. Based on their luminosities, none of the barium stars are
luminous enough to be an asymptotic giant branch star, nor to become
self-enriched in the s-process elements. Finally, we determined that
the barium stars also follow an age-metallicity relation.
Description:
For each stars are provided informations about observations,
magnitudes, spectral type, stellar parameters, abundances, distances,
masses, luminosities and ages. There are informations about atomic
data for all spectral absorption lines used in this work.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 48 182 log of observations and basic information of
the stars
table2.dat 33 196 Atomic lines used to derive the abundances
table3.dat 59 182 Atmospheric parameters of the studied stars
table4.dat 34 96 Atmospheric parameters from the literature
table7.dat 63 182 Abundance ratios [X/Fe] for elements from Na to Ni
table8.dat 58 182 Abundance ratios [X/Fe] for the s-process elements
table12.dat 64 182 Mass, distance, luminosity
table16.dat 77 165 Kinematical data for the true barium stars
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See also:
J/A+A/326/722 : HIPPARCOS Ba stars (Mennessier+ 1997)
J/AZh/79/909 : Chemical abundances in barium stars (Boyarchuk+, 2002)
J/AZh/80/704 : Studies of classical barium stars (Antipova+, 2003)
J/A+A/372/245 : Infrared properties of barium stars (Chen+, 2001)
J/A+A/454/895 : Abundances of 26 barium stars. I. (Allen+, 2006)
J/A+A/454/917 : Abundances of 26 barium stars. II. (Allen+, 2006)
J/A+A/525/A63 : Abundances in Ba stars (Allen+, 2011)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Star Star name
13- 16 I4 yr Year Year of observation
19- 22 I4 s ExpTime Exposure time
24- 28 F5.2 mag Vmag V magnitude
33- 43 A11 --- SpType MK spectral Type
45- 48 A4 --- Ref Source from which the star have been
selected (G1)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Ion Atomic lines used to derive the abundances
7- 13 F7.2 nm lambda Wavelength of each atomic line
16- 19 F4.2 eV EP Excitation potential of each atomic line
22- 26 F5.2 [-] loggf loggf for each atomic line
29- 33 A5 --- Ref Reference for the loggf values used (1)
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Note (1): References as follows:
A04 = Antipova et al. (2004ARep...48..597A 2004ARep...48..597A, Cat. J/AZh/81/658)
B86 = Blackwell D.E. et al. (1986MNRAS.220..289B 1986MNRAS.220..289B)
Ca07 = Carretta et al. (2007A&A...473..129C 2007A&A...473..129C)
C2003 = Chen et al. (2003ApJ...591..925C 2003ApJ...591..925C)
D2002 = Depagne et al. (2002A&A...390..187D 2002A&A...390..187D)
DS91 = Drake and Smith (1991MNRAS.250...89D 1991MNRAS.250...89D)
DH = Den Hartog et al. (2003ApJS..148..543D 2003ApJS..148..543D)
E93 = Edvardsson et al. (1993, Cat. J/A+A/275/101)
GS = Gratton and Sneden (1988A&A...204..193G 1988A&A...204..193G)
H82 = Hannaford et al. (1982ApJ...261..736H 1982ApJ...261..736H)
L01 = Lawler et al. (2001ApJ...556..452L 2001ApJ...556..452L)
L09 = Lawler et al. (2009, Cat. J/ApJS/182/51)
MR94 = Mcwilliam Rich (1994ApJS...91..749M 1994ApJS...91..749M)
PS = Preston Sneden (2001AJ....122.1545P 2001AJ....122.1545P)
R99 = Reddy et al. (1999ApJ...524..831R 1999ApJ...524..831R)
R03 = Reddy et al. (2003, Cat. J/MNRAS/340/304)
R04 = Reyniers et al. (2004, Cat. J/A+A/417/269)
S86 = Smith et al. (1986ApJ...311..843S 1986ApJ...311..843S)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 ---- Star Star name
15- 18 I4 K Teff Effective temperature
20- 22 F3.1 [cm/s2] logg logarithm of surface gravity
24- 28 F5.2 --- [FeI/H] Metallicity using FeI absorption lines
30- 33 F4.2 --- e_[FeI/H] Uncertainty on [FeI/H]
35- 36 I2 --- o_[FeI/H] Number of absorption lines of FeI
38- 42 F5.2 --- [FeII/H] Metallicity using FeII absorption lines
44- 47 F4.2 --- e_[FeII/H] Uncertainty on [FeII/H]
49- 50 I2 --- o_[FeII/H] Number of absorption lines of FeII
52- 54 F3.1 km/s vt Microturbulent velocity
56- 59 A4 ---- Source Source from which the star have been
selected (G1)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Star Star name
13- 16 I4 K Teff Effective temperature
18- 20 F3.1 [cm/s2] logg logarithm of surface gravity
22- 26 F5.2 --- [FeI/H] ? Metallicity using FeI absorption lines
28- 31 F4.2 km/s vt ? Microturbulent velocity
33- 34 I2 --- Ref Source from which the atmosphere parameters
selected (1)
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Note (1): References as follows:
1 = This work, 2016MNRAS.459.4299D 2016MNRAS.459.4299D
2 = Luck & Bond, 1991ApJS...77..515L 1991ApJS...77..515L
3 = Smith, 1984A&A...132..326S 1984A&A...132..326S
4 = Allen & Barbuy, 2006A&A...454..895A 2006A&A...454..895A, Cat. J/A+A/454/895
5 = Barbuy et al., 1992A&A...262..216B 1992A&A...262..216B
6 = Masseron et al., 2010A&A...509A..93M 2010A&A...509A..93M, Cat. J/A+A/509/A93
7 = Soubiran et al., 2010A&A...515A.111S 2010A&A...515A.111S, Cat. B/pastel
8 = Kovacs, 1985A&A...150..232K 1985A&A...150..232K
9 = Lambert et al., 1993PASP..105..568L 1993PASP..105..568L
10 = Malaney & Lambert, 1988MNRAS.235..695M 1988MNRAS.235..695M
11 = Lebre et al., 2006A&A...450.1173L 2006A&A...450.1173L
12 = Casagrande et al., 2011A&A...530A.138C 2011A&A...530A.138C, Cat. J/A+A/530/A138
13 = Antipova et al., 2004ARep...48..597A 2004ARep...48..597A, Cat. J/AZh/81/658
14 = Sneden et al., 1981ApJ...247.1052S 1981ApJ...247.1052S
15 = Clem et al., 2004AJ....127.1227C 2004AJ....127.1227C, Cat. J/AJ/127/1227
16 = Manteiga et al., 2009AJ....137.3245M 2009AJ....137.3245M, Cat. J/AJ/137/3245
17 = Wu et al., 2011RAA....11..924W 2011RAA....11..924W, Cat. J/other/RAA/11.924
18 = Zacs et al., 1997A&AS..122...31Z 1997A&AS..122...31Z
19 = Zacs, 1994A&A...283..937Z 1994A&A...283..937Z
20 = Liu, Liang & Deng, 2009RAA.....9..431L 2009RAA.....9..431L
21 = Smiljanic et al., 2007A&A...468..679S 2007A&A...468..679S
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Star Star name
12- 16 F5.2 [-] [Na/Fe] ? Na abundance derived
18- 22 F5.2 [-] [Mg/Fe] Mg abundance derived
24- 28 F5.2 [-] [Al/Fe] ? Al abundance derived
30- 34 F5.2 [-] [Si/Fe] Si abundance derived
36- 40 F5.2 [-] [Ca/Fe] ? Ca abundance derived
42- 46 F5.2 [-] [Ti/Fe] Ti abundance derived
48- 52 F5.2 [-] [Cr/Fe] ? Cr abundance derived
54- 58 F5.2 [-] [Ni/Fe] Ni abundance derived
60- 63 A4 --- Source Source from which the star have been
selected (G1)
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Star Star name
13- 17 F5.2 [-] [Y/Fe] Y abundance derived
19- 23 F5.2 [-] [Zr/Fe] ? Zr abundance derived
25- 29 F5.2 [-] [La/Fe] ? La abundance derived
31- 35 F5.2 [-] [Ce/Fe] Ce abundance derived
37- 41 F5.2 [-] [Nd/Fe] ? Nd abundance derived
43- 47 F5.2 [-] [s/Fe] Abundance [s/Fe] (2)
49- 53 F5.2 [-] [hs/ls] Abundance [hs/ls]
55- 58 A4 --- Ref Source from which the star have been
selected (G1)
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Note (2): [s/Fe] is the mean abundance ratio of s-process elements
([Y/Fe], [Zr/Fe], [La/Fe], [Ce/Fe], [Nd/Fe]).
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Byte-by-byte Description of file: table12.dat
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Bytes Format Units Label Explanations
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1- 10 A10 ---- Star Star name
12- 14 F3.1 Msun Mass Stellar mass
16- 20 F5.2 ---- Bc Bolometric correction
22- 25 F4.2 mag Av ? Interstellar absorption
27- 30 I4 pc rspec ? Spectroscopic distances
32- 34 I3 pc e_rspec ? Uncertainty on rspec
36- 39 I4 pc rHIP ? Distance given by Hipparcos parallax
41- 43 I3 pc e_rHIP ? Uncertainty on rHIP
45- 49 F5.2 mag VMAG Absolute visual magnitude
51- 54 F4.2 [Lsun] logL logarithm of luminosity
56- 59 F4.1 [yr] logAge logarithm of age
61- 64 A4 ---- Ref Source from which the star have been
selected (G1)
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Byte-by-byte Description of file: table16.dat
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Bytes Format Units Label Explanations
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1- 10 A10 ---- Star Star name
12- 16 F5.1 km/s RV Radial velocity
18- 20 F3.1 km/s e_RV Uncertainty on erv
22- 27 F6.1 km/s Ulsr Spatial velocity U relative to the
local standard rest
29- 32 F4.1 km/s e_Ulsr Uncertainty on Ulsr
34- 39 F6.1 km/s Vlsr Spatial velocity V relative to the
local standard rest
41- 44 F4.1 km/s e_Vlsr Uncertainty on Ulsr
46- 51 F6.1 km/s Wlsr Spatial velocity W relative to the
local standard rest
53- 56 F4.1 km/s e_Wlsr Uncertainty on Wlsr
58- 61 F4.2 --- p1 Probability of star being member of thin disk
63- 66 F4.2 --- p2 Probability of star being member of thick disk
68- 71 F4.2 --- p3 Probability of star being member of halo
73- 77 F5.1 km/s Vspa Spatial velocity
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Global notes:
Note (G1): References as follows:
I = Table I of MacConnell et al. (1972AJ.....77..384M 1972AJ.....77..384M)
II = Table II of MacConnell et al. (1972AJ.....77..384M 1972AJ.....77..384M)
B81 = Bidelman (1981AJ.....86..553B 1981AJ.....86..553B)
G97 = Gomez et al. (1997, Cat. J/A+A/319/881)
LB91 = Luck & Bond (1991ApJS...77..515L 1991ApJS...77..515L)
M97 = Mennessier et al. (1997, Cat. J/A+A/326/722)
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Acknowledgements:
Denise de Castro, denise(at)on.br
(End) Patricia Vannier [CDS] 31-May-2016