J/A+AS/141/491 Chemical composition of halo and disk stars (Nissen+, 2000) ================================================================================ Chemical composition of 90 F and G disk dwarfs Chen Y.Q, Nissen P.E., Zhao G., Zhang H.W., Benoni T. =2000A&AS..141..491C ================================================================================ ADC_Keywords: Stars, dwarfs ; Abundances, peculiar ; Space velocities ; Equivalent widths Keywords: nuclear reactions, nucleosynthesis, abundances - stars: abundances - stars: kinematics - galaxy: abundances - galaxy: evolution - galaxy: solar neighbourhood Description: Table 3. Atmospheric parameters, space velocities, distances, masses and ages of the program stars. Table 4. Atomic line data including wavelength, excitation energy of the lower level, the logarithm of the oscillator strength (the experimental or theoretical value, the corrected value and the differential value from standard stars) and the adopted enhancement factor of the Unsold approximation to the van der Waals damping constant. The last column gives the equivalent width in the spectrum of HD 142373 representing a typical metallicity of the sample of stars. Uncertain EWs marked by (:) and strong lines with EW>100m{AA} are not used in the abundance determination for this star. Table 5. Abundance ratios for the program stars. The oxygen abundance is derived from the 7774{AA} triplet but scaled to results from the forbidden [OI] line at 6300{AA}. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table3.dat 83 90 Stellar atmospheric parameters, space velocities, distances, masses and ages table4.dat 74 256 Atomic line data and equivalent widths for HD 142373 table5.dat 107 90 Abundance ratios -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 A7 --- HD HD ) number of the star 10- 10 A1 --- f_HD [BV] B: suspected binary, V: variable 15- 19 F5.0 K T(eff) Effective temperature 22- 25 F4.2 cm/s2 log(g) Logarithmic surface gravity 28- 32 F5.2 [Sun] [Fe/H] Iron-to-hydrogen ratio 35- 38 F4.2 km/s Vturb Microturbulence velocity 41- 46 F6.1 km/s Uvel Galactic U velocity (1) 49- 54 F6.1 km/s Vvel Galactic V velocity (1) 57- 62 F6.1 km/s Wvel Galactic W velocity (1) 65- 69 F5.1 pc Dist Heliocentric Distance 72- 75 F4.2 solMass Mass Stellar mass 78- 81 F4.1 Gyr Age Stellar age 82- 82 A1 --- u_Age [:] indicates uncertain age -------------------------------------------------------------------------------- Note (1): U is defined to be positive in the Galactic anticentric direction, and the adopted solar motion with respect to the LSR is (U,V,W)=(-10.2,+5.2,+7.2)km/s. Stars with an error of the logarithmic age >0.15 are marked by (:) -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 A4 --- Element Chemical element and ionization stage 10- 17 F8.3 0.1nm Lambda Wavelength 21- 24 F4.2 eV EP Line excitation energy of lower level 29- 34 F6.3 --- log(gf)t ? Experimental or theoretical log(gf) value 39- 44 F6.3 --- log(gf)c ? Corrected log(gf) value 49- 54 F6.3 --- log(gf)d ? Differencial log(gf) value from standard stars 59- 61 F3.1 --- E6 Enhancement factor of the Unsold approximation to the van der Waals damping constant 66- 70 F5.1 0.1pm EW ? Equivalent width for HD 142373 71- 71 A1 --- u_EW [:] indicates uncertain equivalent width -------------------------------------------------------------------------------- Byte-by-byte Description of file: table5.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 A7 --- HD HD (Cat. ) number of star 11- 15 F5.2 [Sun] [Fe/H]I Iron-to-hydrogen ratio from FeI lines 19- 23 F5.2 [Sun] [Fe/H]II Iron-to-hydrogen ratio from FeII lines 27- 30 F4.2 [Sun] [O/Fe] ? Oxygen-to-iron ratio 34- 37 F4.2 [Sun] [Na/Fe] ? Sodium-to-iron ratio 41- 44 F4.2 [Sun] [Mg/Fe] ? Magnesium-to-iron ratio 48- 51 F4.2 [Sun] [Al/Fe] ? Aluminium-to-iron ratio 55- 58 F4.2 [Sun] [Si/Fe] ? Silicon-to-iron ratio 62- 65 F4.2 [Sun] [K/Fe] ? Potassium-to-iron ratio 69- 72 F4.2 [Sun] [Ca/Fe] ? Calcium-to-iron ratio 75- 79 F5.2 [Sun] [Ti/Fe] ? Titanium-to-iron ratio 83- 86 F4.2 [Sun] [V/Fe] ? Vanadium-to-iron ratio 90- 93 F4.2 [Sun] [Cr/Fe] ? Chromium-to-iron ratio 97-100 F4.2 [Sun] [Ni/Fe] ? Nickel-to-iron ratio 104-107 F4.2 [Sun] [Ba/Fe] ? Barium-to-iron ratio -------------------------------------------------------------------------------- Acknowledgements: Poul Erik Nissen ================================================================================ (End) Patricia Bauer [CDS] 24-Jan-2000