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J/A+A/397/257       Chemical compositions of four barium stars    (Liang+, 2003)

Chemical compositions of four barium stars. Liang Y.C., Zhao G., Chen Y.Q., Qiu H.M., Zhang B. <Astron. Astrophys. 397, 257 (2003)> =2003A&A...397..257L
ADC_Keywords: Stars, barium ; Binaries, spectroscopic ; Equivalent widths ; Abundances, peculiar Keywords: stars: abundances - atmospheres - chemically peculiar - evolution - binaries: spectroscopic Abstract: Chemical compositions of four barium stars are studied. We obtain their α, iron peak and neutron-capture (n-capture) process element abundances. The atomic data and measured equivalent widths (EWs) of the related spectral lines are given. The abundance errors caused by the combined effects of the uncertainties in oscillator strengths loggf-values, equivalent widths (EWs) and stellar atmospheric parameters (e.g. effective temperature Teff, surface gravity logg, and microturbulent velocity {xit}) are the total abundance uncertainties. The individual and total abundance uncertainties caused by these factors are given. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 04 14 58.8 -00 59 51 HD 26886 04 18 33.8 +02 28 14 HD 27271 06 51 54.0 +06 36 25 HD 50082 11 22 49.6 +43 28 58 HD 98839 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 70 134 Atomic data and EWs of lines in four stars table5.dat 55 73 Abundance uncertainties
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 8 F8.3 0.1nm lambda Wavelengths of line 12- 16 A5 --- Ion Atomic element of line 19- 22 F4.2 eV chi Excitation potential of line 26- 30 F5.2 --- loggf Oscillator strengths of line 32- 33 A2 --- r_loggf The reference sources of n-capture elements (1) 36- 38 I3 0.1pm EWs(1) ? Equivalent widths of lines in star HD 26886 43- 45 I3 0.1pm EWs(2) ? Equivalent widths of lines in star HD 27271 50- 52 I3 0.1pm EWs(3) ? Equivalent widths of lines in star HD 50082 57- 59 I3 0.1pm EWs(4) ? Equivalent widths of lines in star HD 98839
Note (1): References: h : Hannaford et al., 1982ApJ...261..736H b : Biemont et al., 1981ApJ...248..867B wm: Weise & Martin, 1980, NSDRS-NBS 68 lb: Luck & Bond, 1991ApJS...77..515L b2: Biemont et al., 1982A&A...107..166B
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Star Star name 10- 14 A5 --- Ion Atomic element in the star 19- 22 F4.2 --- sigma(EW/sqrt(N)) Abundance errors caused by EWs values 25- 29 F5.2 --- Delta(Teff) Abundance errors caused by increasing 100K in effective temperature 32- 36 F5.2 --- Delta(logg) Abundance errors caused by increasing in surface gravity (1) 39- 43 F5.2 --- Delta(xit) Abundance errors caused by increasing 0.3km/s in microturbulent velocity 45- 49 F5.2 --- sigma(tot) Total abundance errors caused by the combined uncertainties in gf-values, EWs and stellar atmospheric parameters
Note (1): The increasing in surface gravity is of 0.3 for HD 26886, 0.2 for HD 27271 and HD 50082, 0.1 for HD 98839.
Acknowledgements: Yanchun Liang ,
(End) Patricia Bauer [CDS] 14-Oct-2002
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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