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J/A+A/381/500       Eu abundances in F and G disk stars      (Koch+, 2002)

Eu abundances in F and G disk stars. Koch A., Edvardsson B. <Astron. Astrophys. 381, 500 (2002)> =2002A&A...381..500K
ADC_Keywords: Abundances, peculiar ; Stars, F-type ; Stars, G-type Keywords: stars: abundances - Galaxy: abundances Abstract: Europium abundances for 74 F and G dwarf stars of the galactic disk have been determined. The stars were selected from the sample of Edvardsson et al. (1993, Cat. J/A+A/275/101) and [Eu/Fe] shows a smaller scatter and a slightly weaker trend with [Fe/H] than found by Woolf et al. (1995ApJ...453..660W). The data of the two analyses are homogeneized and merged. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 24 32 Isotopic and hyperfine structure line components for the 4129.7Å Eu II line table5.dat 33 74 Eu abundances for the programme stars, and Fe abundances and ages table6.dat 33 125 Homogenized and merged abundance data for the present sample and the data of Woolf V.M., Tomkin J., and Lambert D.L. 1995ApJ...453..660W, Fe abundances and ages
See also: J/A+A/275/101 : Chemical evolution of the galactic disk I. (Edvardsson+ 1993) J/A+AS/102/603 : Chemical evolution of the galactic disk II. (Edvardsson+ 1993) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 9 F9.4 0.1nm Wavel Wavelength [Angstroems] 11- 13 I3 --- Isotop [151,153] Mass number, 151 or 153 15- 20 F6.3 --- loggf Relative log gf assuming isotope ratio 50/50 22- 24 F3.1 0.1pm EW Solar equivalent width [milliAngstroems]
Byte-by-byte Description of file: table5.dat table6.dat
Bytes Format Units Label Explanations
1- 2 A2 --- Cat Catalogue, HR or HD 4- 9 I6 --- No Entry number in the catalogue 11- 15 F5.2 --- [Eu/H] Ratio [Eu/H] (from Eu II 4129.7Å) (1) 17- 21 F5.2 --- [Fe/H] Ratio [Fe/H] (from Fe II, from Edvardsson et al., 1993, Cat. J/A+A/275/101) (1) 23- 27 F5.2 --- [Eu/Fe] Ratio [Eu/Fe] (= [Eu/H]-[Fe/H]) (1) (3) 29- 33 F5.2 [Gyr] logAge ? log (stellar age/1Gyr) (3) (2)
Note (1): [X/Y] = log(N(X)/N(Y))star - log(N(X)/N(Y))Sun where N(X)/N(Y) is the ratio of the total number densities of elements X and Y in the stellar and solar atmospheres Note (2): Ages for five stars are undetermined, then the field is left blank Note (3): Fe abundances and ages from Edvardsson B, Andersen J., Gustafsson B., Lambert D.L., Nissen P.E., Tomkin J. 1993, Cat. J/A+A/275/101
Acknowledgements: Bengt Edvardsson
(End) Bengt Edvardsson [UAO] 07-Nov-2001
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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