J/AZh/79/909 Chemical abundances in barium stars (Boyarchuk+, 2002)
Analysis of chemical abundances in the atmospheres of moderate barium stars.
Boyarchuk A.A., Pakhomov Yu.V., Antipova L.I., Boyarchuk M.E.
<Astron. Zh. 79, 909 (2002)>
=2002AZh....79..909B 2002AZh....79..909B
=2002ARep...46..819B 2002ARep...46..819B
ADC_Keywords: Stars, barium; Equivalent widths
Abstract:
We used high-resolution spectra to compute model atmospheres to derive
the atmospheric abundances of moderate barium stars. Comparing our
results with analogous data for normal red giants, we find that the
moderate barium stars appear to not differ systematically from normal
red giants. Their chemical abundance anomalies show the same patterns
and can be interpreted in terms of evolutionary effects: the
evolutionary stage, mass, luminosity, and metallicity of the objects.
Objects:
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RA (2000) DE Designation
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06 47 51.65 +02 24 43.8 18 Mon = HD 49293
09 39 51.36 -01 08 34.1 Iot Hya = HD 83618
15 01 56.76 +40 23 26.0 Bet Boo = HD 133208
17 30 44.31 +26 06 38.3 Lam Her = HD 158899
18 59 37.36 +15 04 05.9 Eps Aql = HD 176411
13 02 10.60 +10 57 32.9 Eps Vir = HD 113226
16 57 40.10 +09 22 30.1 Kap Oph = HD 153210
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 76 526 Elemental abundances in the atmosphere of
program stars relative to solar abundances
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See also:
J/AZh/80/704 : Studies of classical barium stars (Antipova+, 2003)
J/AZh/81/658 : Equivalent widths of 9 barium stars (Antipova+, 2004)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- El Element and ionization stage
7- 13 F7.2 0.1nm Lambda Wavelength
16- 20 F5.2 eV ExcPot Excitation potentials of the lower level
23- 27 F5.2 --- loggf Oscillator strength (log gf)
30- 34 F5.3 0.1nm EW18Mon ? Equivalent width of 18 Mon
37- 41 F5.3 0.1nm EWiHya ? Equivalent width of iota Hya
44- 48 F5.3 0.1nm EWbBoo ? Equivalent width of beta Boo
51- 55 F5.3 0.1nm EWlHer ? Equivalent width of lam Her
58- 62 F5.3 0.1nm EWeAql ? Equivalent width of epsilon Aql
65- 69 F5.3 0.1nm EWeVir ? Equivalent width of epsilon Vir
72- 76 F5.3 0.1nm EWkOph ? Equivalent width of kappa Oph
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(End) Veta Avedisova [INASAN] 11-Mar-2003