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.
<Astron. Astrophys. Suppl. Ser. 141, 491 (2000)>
=2000A&AS..141..491C 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>100mÅ
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 7774Å triplet but scaled to results from the
forbidden [OI] line at 6300Å.
File Summary:
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FileName Lrecl Records Explanations
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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
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- HD HD <Cat. III/135) 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
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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 (:)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- HD HD (Cat. III/135) 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
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Acknowledgements: Poul Erik Nissen
(End) Patricia Bauer [CDS] 24-Jan-2000