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J/PASJ/57/45        Lithium abundances of F-K stars        (Takeda+, 2005)

Lithium abundances of F-, G-, and K-type stars: profile-fitting analysis of the Li I 6708 doublet. Takeda Y., Kawanomoto S. <Publ. Astron. Soc. Jap., 57, 45-63 (2005)> =2005PASJ...57...45T
ADC_Keywords: Stars, late-type ; Stars, atmospheres ; Abundances ; Equivalent widths Keywords: stars: abundances - stars: atmospheres - stars: late-type Abstract: An extensive profile-fitting analysis was performed for the Li(+Fe) 6707-6708Å feature of nearby 160 F-K dwarfs/subgiants (including 27 planet-host stars) in the Galactic disk (7000K≳Teff≳5000K, -1≲[Fe/H]≲+0.4), in order to establish the photospheric lithium abundances of these stars. The non-LTE effect (though quantitatively insignificant) was taken into account based on our statistical equilibrium calculations, which were carried out on an adequate grid of models. Our results confirmed most of the interesting observational characteristics revealed by recently published studies, such as the bimodal distribution of the Li abundances for stars at Teff≳6000K, the satisfactory agreement of the upper envelope of the A(Li) vs. [Fe/H] distribution with the theoretical models, the existence of a positive correlation between A(Li) and the stellar mass, and the tendency of lower lithium abundances of planet-host stars (as compared to stars without planets) at the narrow ``transition'' region of 5900K≳Teff≳5800K. The solar Li abundance derived from this analysis is 0.92 (H=12.00), which is by 0.24dex lower than the widely referenced standard value of 1.16. Description: The files are the results of non-LTE abundance corrections for the Li I 6708 resonance doublet feature, computed on a large grid of models [Teff= 5000, 5500, 6000, 6500, 7000 K, log g (cm/s2) = 3.0, 3.5, 4.0, 4.5, 5.0, [Fe/H] = -1.0, -0.5, 0.0, +0.5, A(Li) = 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5] for the microturbulence of 1.5km/s. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 65 161 Stellar parameters and the results of the abundance analysis ncor_m10.dat 89 175 E.W. and NLTE correction of Li 6708: [Fe/H]=-1.0 ncor_m05.dat 89 175 E.W. and NLTE correction of Li 6708: [Fe/H]=-0.5 ncor_p00.dat 89 175 E.W. and NLTE correction of Li 6708: [Fe/H]= 0.0 ncor_p05.dat 89 175 E.W. and NLTE correction of Li 6708: [Fe/H]=+0.5
See also: J/PASJ/57/27 : Atmospheric parameters of nearby F-K stars (Takeda+, 2005) J/PASJ/57/65 : CNO abundances of solar-type stars (Takeda+, 2005) J/PASJ/57/109 : Late-G giants abundances (Takeda+, 2005) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number (999999 for the Sun) 8- 11 I4 k Teff Effective temperature 13- 16 F4.2 [cm/s2] logg log of surface gravity 18- 21 F4.2 km/s vt Microturbulence velocity 23- 27 F5.2 [Sun] [Fe/H] Metallicity 29- 32 F4.2 solMass Mass Stellar mass 34- 37 F4.1 0.1pm EW(Fe) ? Fe I 6707.4 equivalent width 39- 42 F4.2 --- A(Fe) ? LTE Fe abundance (G1) 44 A1 --- l_EW(Li) Limit flag on EW(Li) 45- 49 F5.1 0.1nm EW(Li) Li 6708 equivalent width 50 A1 --- n_EW(Li) [)] Uncertainty flag on EW(Li) 52 A1 --- l_A(Li)NLTE Limit flag on A(Li)NLTE 53- 56 F4.2 --- A(Li)NLTE NLTE Li abundance (G1) 57 A1 --- u_A(Li)NLTE [)] Uncertainty flag on A(Li)NLTE 59- 63 F5.2 --- Delta ? LTE correction (∼A(NLTE)-A(LTE) 65 A1 --- Rem [P] P: planet-harboring star
Byte-by-byte Description of file: ncor_*.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Code Model code (1) 12- 17 F6.1 0.1nm lambda Line wavelength (center of the doublet feature) 20- 25 F6.0 K Teff Effective temperature 27- 31 F5.2 cm/s2 logg logarithmic surface gravity 34- 38 F5.2 [Sun] [Fe/H] Metallicity 41- 43 F3.1 km/s vt Microturbulence velocity 46- 50 F5.3 --- Ainput Assigned sodium abundance (G1) 52 A1 --- --- [(] 54- 59 F6.2 0.1pm W(LTE) LTE equivalent width 60 A1 --- --- [)] 63- 68 F6.2 0.1pm W(NLTE) NLTE equivalent width 71- 75 F5.3 --- A(NLTE) NLTE abundance (G1) 78- 82 F5.3 --- A(LTE) LTE abundance (G1) 84- 89 F6.3 --- Delta Non-LTE abundance correction
Note (1): Code for Teff, logg and [Fe/H]: i.e.: t50g30m05 means Teff = 5000K, logg = 3.0 , [Fe/H] = -0.5
Global Notes: Note (G1): All of the abundances (A) are represented following the conventional normalization of A(H)= 12.00.
History: From PASJ editor, Maho Kuroiwa, maho(at)pasj.asj.or.jp
(End) Patricia Vannier [CDS] 06-Apr-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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