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J/A+A/275/101    Chemical evolution of the galactic disk I.   (Edvardsson+ 1993)

The chemical evolution of the galactic disk I. Analysis and results Edvardsson B., Andersen J., Gustafsson B., Lambert D.L., Nissen P.E., Tomkin J. <Astron. Astrophys. 275, 101 (1993)> =1993A&A...275..101E (SIMBAD/NED RefCode)
ADC_Keywords: Abundances ; Equivalent widths ; Stars, ages Keywords: Galaxy: evolution - Galaxy: structure - Galaxy: kinematics and dynamics Stars: abundances - Stars: atmospheres - Stars: fundamental parameters Description: From high resolution, high S/N spectroscopic observations of carefully selected northern and southern stars, abundances of O, Na, Mg, Al, Si, Ca, Ti, Fe, Ni, Y, Zr, Ba and Nd, as well as photometric ages, are derived for 189 nearby field F and G stars. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table8.dat 44 86 Atomic line data and solar equivalent widths stars.dat 180 189 Fundamental data and chemical abundances of 14 species for the programme stars
See also: J/A+AS/102/603 : Chemical evolution of galactic disk II. (Edvardsson+ 1993) Byte-by-byte Description of file: table8.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Element Line identification: chemical element and ionization stage 7- 13 F7.2 0.1nm Lambda Wavelength (Angstroms) 15- 19 F5.2 eV E Line excitation energy 21- 25 F5.2 --- log.gf Log gf (oscillator strength) 27- 29 F3.1 --- Factor Enhancement factor to the "classical van der Waals damping Gamma_6" 31- 36 E6.2 Hz Damping Radiation damping constant 38- 42 F5.1 0.1pm W Solar flux spectrum equivalent width (milliAngstrom). (1) 44 A1 --- Source for Solar equivalent width: E=ESO spectrum, M=McDonald spectrum
Note (1): the measured equivalent widths were corrected for 1% scattered light by multiplication by the factor 1.01 as described in Sect.2 of Paper (1993A&AS..102..603E)
Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Name Star catalogue, HR or HD 11- 14 I4 K Teff Effective temperature 16- 19 F4.2 [cm/s2] log.g Logarithmic surface gravity 21- 25 F5.2 [Sun] [Me/H] overall photometric metallicity derived for the stars, normalized on the Sun (1) 26 A1 --- u_[Me/H] Uncertainty flag (:) on Me/H (2) 27- 32 F6.2 [Sun] [Fe/H] resulting spectroscopic iron abundance (derived from lines of Fe I), normalized to the Sun 34- 38 F5.1 pc R Heliocentric distance 40- 45 F6.1 km/s U Heliocentric velocity (U is positive towards the galactic anti-centre), 47- 52 F6.1 km/s V Heliocentric velocity (V is positive in the direction of circular motion) 54- 59 F6.1 km/s W Heliocentric velocity (W is positive towards the galactic north pole) 61- 65 F5.2 kpc Rp Perigalactic distance 67- 71 F5.2 kpc Rm Straight mean of the perigalactic and the apogalactic distances 73- 76 F4.2 kpc Zmax Maximum distance from the galactic plane 78- 81 F4.2 --- e Orbital eccentricity as projected on the galactic plane 83- 86 F4.2 [Ga] log.age ? Logarithm of the stellar age (in Gigayears) determined from isochrones (3) 88- 90 A3 --- Rem Remarks (4) 92- 96 F5.2 [Sun] [FeI/H] Chemical abundance (normalized to the Sun) 98-102 F5.2 [Sun] [OI/H] ? Chemical abundance (normalized to the Sun) 104-108 F5.2 [Sun] [NaI/H] ? Chemical abundance (normalized to the Sun) 110-114 F5.2 [Sun] [MgI/H] ? Chemical abundance (normalized to the Sun) 116-120 F5.2 [Sun] [AlI/H] ? Chemical abundance (normalized to the Sun) 122-126 F5.2 [Sun] [SiI/H] ? Chemical abundance (normalized to the Sun) 128-132 F5.2 [Sun] [CaI/H] ? Chemical abundance (normalized to the Sun) 134-138 F5.2 [Sun] [TiI/H] ? Chemical abundance (normalized to the Sun) 140-144 F5.2 [Sun] [FeII/H] ? Chemical abundance (normalized to the Sun) 146-150 F5.2 [Sun] [NiI/H] ? Chemical abundance (normalized to the Sun) 152-156 F5.2 [Sun] [YII/H] ? Chemical abundance (normalized to the Sun) 158-162 F5.2 [Sun] [ZrII/H] ? Chemical abundance (normalized to the Sun) 164-168 F5.2 [Sun] [BaII/H] ? Chemical abundance (normalized to the Sun) 170-174 F5.2 [Sun] [NdII/H] ? Chemical abundance (normalized to the Sun) 176-180 F5.2 [Sun] [alpha/H] = 0.25([Mg/H] + [Si/H] + [Ca/H] + [Ti/H])
Note (1): [Me/H] values closer to the resulting [Fe/H] values were used for the models of 15 stars, cf. Sect.3.1.1. Note (2): [Me/H] values for these 15 are given with a colon corresponding to parentheses in the printed version Note (3): this parameter is missing for 7 stars Note (4): the following symbols are used: SB = spectroscopic binaries (with possibly uncertain distances), pm = stars with uncertainties in proper motions significantly above 0.005 arcsecs per year h = possible hook stars (for which the ages may be underestimated by 0.15 dex).

(End) [CDS] 18-May-1993
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