J/A+A/533/A51 Abundances of 12 metal-rich barium stars (Pereira+, 2011)
Chemical abundances and kinematics of a sample of metal-rich barium stars.
Pereira C.B., Sales Silva J.V., Chavero C., Roig F., Jilinkski E.
<Astron. Astrophys. 533, A51 (2011)>
=2011A&A...533A..51P 2011A&A...533A..51P
ADC_Keywords: Stars, barium ; Abundances
Keywords: stars: abundances - stars: chemically peculiar
Abstract:
We determined the atmospheric parameters and abundance pattern for a
sample of metal-rich barium stars. We used high resolution optical
spectroscopy. Atmospheric parameters and abundances were determined
using the local thermodynamic equilibrium atmosphere models of Kurucz
and the spectral analysis code MOOG.
We show that the stars have enhancement factors, [s/Fe], from 0.25
to 1.16. Their abundance pattern of Na, Al, α-elements and iron
group elements as well as their kinematical properties are similar to
the characteristics of the other metal rich and super metal-rich stars
already analyzed. We conclude that metal rich barium stars do not
belong to the bulge population. We also show that metal rich barium
stars are useful targets to probe the s-process enrichment in high
metallicity environments.
Description:
The table contains equivalent width measurements for each individual
line of the adopted line list, and the corresponding line parameters.
The data analysed consist of FEROS@2.2m spectra of 12 barium stars.
The resolution is of about R=45 000, which covers the range from 4500
to 9500Å, which include all the lines analysed.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 42 12 List of stars observed
table2.dat 46 1248 Observed FeI and FeII lines
table4.dat 46 2220 Other lines studied
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See also:
V/81 : Taxonomy of Barium Stars (Lu 1991)
II/192 : UBV Photometry of Barium Stars (Watanabe+ 1993)
J/A+A/326/722 : HIPPARCOS Ba stars (Mennessier+ 1997)
J/A+A/321/L9 : Barium stars in the HR diagram (Bergeat+ 1997)
J/A+A/319/881 : Ba II strength of barium stars (Gomez+ 1997)
J/A+A/372/245 : Infrared properties of barium stars (Chen+, 2001)
J/AZh/79/909 : Chemical abundances in barium stars (Boyarchuk+, 2002)
J/A+A/397/257 : Chemical compositions of four barium stars (Liang+, 2003)
J/AZh/80/704 : Studies of classical barium stars (Antipova+, 2003)
J/AZh/81/658 : Equivalent widths of 9 barium stars (Antipova+, 2004)
J/A+A/454/917 : Abundances of 26 barium stars. II. (Allen+, 2006)
J/A+A/454/895 : Abundances of 26 barium stars. I. (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 --- Name Star name
12- 21 A10 "D/M/Y" Date Observation date
24- 26 F3.1 mag Vmag V-band magnitude
28- 35 A8 --- SpT Spectral type from Gomez+ (1997A&A...319..881G 1997A&A...319..881G)
37- 40 A4 --- Sp2 Other spectral type
42 A1 --- r_Sp2 [b-e] Reference of second spectral type (1)
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Note (1): References as follows:
b = Table II of MacConnell et al. (1972AJ.....77..384M 1972AJ.....77..384M)
c = Table I of MacConnell et al. (1972AJ.....77..384M 1972AJ.....77..384M)
d = Bidelman (1981AJ.....86..553B 1981AJ.....86..553B)
e = Gomez et al. (1997A&A...319..881G 1997A&A...319..881G)
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Byte-by-byte Description of file: table[24].dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Star name
12- 15 A4 --- El Element and ionization stage
18- 24 F7.2 0.1nm lambda Wavelength (expressed in Angstroem)
26- 29 F4.2 eV EP Excitation potential of the lower level
31- 36 F6.3 --- loggf Oscillator strength
38- 42 A5 --- Ref References (only in table4) (1)
44- 46 I3 0.1pm EW ? Line equivalent width
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Note (1): References as follows:
B81 = Biemont et al., 1981ApJ...248..867B 1981ApJ...248..867B
Ca07 = Carretta et al;, 2007A&A...473..129C 2007A&A...473..129C
DS91 = Drake & Smith, 1991MNRAS.250...89D 1991MNRAS.250...89D
E93 = Edvardsson et al., 1993A&A...275..101E 1993A&A...275..101E, Cat. J/A+A/275/101
GS = Gratton & Sneden, 1988A&A...204..193G 1988A&A...204..193G
H82 = Hannaford et al., 1982ApJ...261..736H 1982ApJ...261..736H
PS = Preston & Sneden, 2001AJ....122.1545P 2001AJ....122.1545P
R03 = Reddy et al., 2003MNRAS.340..304R 2003MNRAS.340..304R, Cat. J/MNRAS/340/304
R04 = Reyniers et al., 2004A&A...417..269R 2004A&A...417..269R, Cat. J/A+A/417/269
MFK = Martin et al. 2002, NIST Atomic Spectra Database Version2.0
(Online Available), NIST Standard Reference Database, National
Institute of Standards and Technology, Gaithersburg Maryland.
MFW = Martin et al., 1988atps.book.....M 1988atps.book.....M
MR94 = McWilliam & Rich, 1994ApJS...91..749M 1994ApJS...91..749M
S86 = Smith et al., 1986A&A...165..126S 1986A&A...165..126S;
S96 = Smith et al., 1996A&A...315..179S 1996A&A...315..179S
SN96 = SNEDEN et al., 1996ApJ...467..819S 1996ApJ...467..819S
VWR = van Winckel & Reyniers, 2000A&A...354..135V 2000A&A...354..135V
WSM = Wiese et al., 1969atp..book.....W 1969atp..book.....W
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Acknowledgements:
Claudio B. Pereira, claudio(at)on.br
(End) Claudio Pereira [Obs. Nacional], Patricia Vannier [CDS] 18-Jul-2011