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 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:
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FileName Lrecl Records Explanations
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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
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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
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: ncor_*.dat
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Bytes Format Units Label Explanations
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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
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Note (1): Code for Teff, logg and [Fe/H]:
i.e.: t50g30m05 means Teff = 5000K, logg = 3.0 , [Fe/H] = -0.5
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Global Notes:
Note (G1): All of the abundances (A) are represented following the
conventional normalization of A(H)= 12.00.
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History:
From PASJ editor, Maho Kuroiwa, maho(at)pasj.asj.or.jp
(End) Patricia Vannier [CDS] 06-Apr-2005