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J/A+A/434/275    Galactic thin disk [Th/Eu] abundance ratios (del Peloso+, 2005)

The age of the Galactic thin disk from Th/Eu nucleocosmochronology. I. Determination of [Th/Eu] abundance ratios. del Peloso E.F., da Silva L., Porto de Mello G.F. <Astron. Astrophys. 434, 275 (2005)> =2005A&A...434..275D
ADC_Keywords: Stars, late-type ; Abundances, peculiar Keywords: Galaxy: disk - Galaxy: evolution - stars: late-type - stars: fundamental parameters - stars: abundances Abstract: The objective of this work is the determination of the age of the Galactic disk using Th/Eu nucleocosmochronology. To achieve this objective, it is necessary to obtain the abundances of Th and Eu through spectral synthesis, and to perform the synthesis it is necessary to know the atmospheric parameters and chemical abundances of contaminating elements. Description: The file table6 contains all the equivalent widths of lines used for atmospheric parameters and abundance determinations of contaminating elements. Some lines have not been effectively used in some stars; these have equivalent widths equal to 0.00 in the file. All equivalent widths are presented in milli-Angstroems. Observations with the ESO 1.52 m telescope were performed by the authors in two runs, in March and August, 2001. All obtained FEROS spectra have high nominal resolving power (R=48 000), signal-to-noise ratio (S/N≥300 in the visible) and coverage (3500 to 9200Å spread over 39 echelle orders). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 56 20 Star positions and magnitudes (from Simbad) table6.dat 46 3360 Equivalent widths for all lines and sample stars
Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [HD] 4- 9 I6 --- HD HD number 12- 13 I2 h RAh Right ascension (J2000.0) 15- 16 I2 min RAm Right ascension (J2000.0) 18- 21 F4.1 s RAs Right ascension (J2000.0) 23 A1 --- DE- Declination sign (J2000.0) 24- 25 I2 deg DEd Declination (J2000.0) 27- 28 I2 arcmin DEm Declination (J2000.0) 30- 31 I2 arcsec DEs Declination (J2000.0) 35- 39 F5.2 mag Bmag ? B magnitude 41- 45 F5.2 mag Vmag ? V magnitude 47- 56 A10 --- SpType MK spectral type
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [HD] 4- 9 I6 --- HD HD number 11- 18 F8.3 0.1nm Lambda Wavelength of line (A) 20- 22 A3 --- Element Element symbol and ionization state 24- 27 F4.2 eV EP Lower excitation potential 29- 34 F6.3 --- loggf Logarithm of oscillator strength 36- 40 F5.1 0.1pm EW0 Equivalent width of the Sun 42- 46 F5.1 0.1pm EW ?=0.00 Equivalent width of the star
Acknowledgements: Eduardo Fernandez del Peloso, epeloso(at)on.br
(End) Patricia Vannier [CDS] 14-Jan-2005
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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