J/A+A/468/663 Li abundances in solar-analog stars (Takeda+, 2007)
Behaviors of Li abundances in solar-analog stars:
Evidence for line-width dependence.
Takeda Y., Kawanomoto S., Honda S., Ando H., Sakurai T.
<Astron. Astrophys. 468, 663 (2007)>
=2007A&A...468..663T 2007A&A...468..663T
ADC_Keywords: Stars, late-type ; Stars, nearby ; Abundances ; Equivalent widths
Keywords: stars: abundances - stars: atmospheres -
stars: fundamental parameters - stars: late-type -
Sun: fundamental parameters
Abstract:
It is known that the surface lithium abundances of field solar-analog
G dwarfs show a large dispersion of ≳2dex (among which our Sun is
located at the lower end) despite the similarity of stellar
parameters, and planet-host stars tend to show comparatively lower Li
abundances in the narrow Teff range.
To investigate the reason for these phenomena, an extensive study of
Li abundances and their dependence on stellar parameters was carried
out for a homogeneous sample of 118 selected solar analogs based on
high-dispersion spectra obtained at Okayama Astrophysical Observatory.
Description:
The atmospheric parameters were spectroscopically determined by using
the equivalent widths of FeI and FeII lines, the ages/masses were
estimated from stellar evolutionary tracks, and the width of the
macrobroadening (rotation plus macroturbulence) function as well as Li
abundances (ALi) were established by spectrum-fitting analyses.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 115 118 Results of the kinematic parameters
table3.dat 54 18445 EWs of Fe I/Fe II lines and resulting Fe abundances
table4.dat 132 118 Results of the atmospheric parameters, mass and age
table5.dat 93 118 Abundances and macro-broadening derived from
6080-6089 fit
table6.dat 32 118 Li abundance results from LiI 6708 line profile fit
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
J/AJ/105/2299 : Li abundance of solar-type stars. II. (Soderblom+, 1993)
J/A+A/371/943 : Lithium abundances for 185 main-sequence stars (Chen+, 2001)
J/A+A/409/251 : Li abundances and velocities in F and G stars (Mallik+, 2003)
J/MNRAS/349/757 : Masses, ages and metallicities of F-G dwarfs (Lambert+, 2004)
J/PASJ/57/45 : Lithium abundances of F-K stars (Takeda+, 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP HIP (Cat. I/239) number
9- 10 I2 h RAh Right ascension ICRS (J1991.25) (1)
12- 13 I2 min RAm Right ascension ICRS (J1991.25) (1)
15- 19 F5.2 s RAs Right ascension ICRS (J1991.25) (1)
21 A1 --- DE- Declination sign ICRS (J1991.25) (1)
22- 23 I2 deg DEd Declination ICRS (J1991.25) (1)
25- 26 I2 arcmin DEm Declination ICRS (J1991.25) (1)
28- 31 F4.1 arcsec DEs Declination ICRS (J1991.25) (1)
35- 40 F6.2 mas plx Trigonometric parallax (1)
42- 49 F8.2 mas/yr pmRA Proper motion in alpha direction (1)
51- 58 F8.2 mas/yr pmDE Proper motion in delta direction (1)
60- 65 F6.1 km/s HRV Heliocentric radial velocity (from table 1)
67- 72 F6.3 kpc Rm Mean galactocentric distance
74- 79 F6.3 kpc zm Maximum separation from the galactic plane
82- 86 F5.3 --- e Orbital eccentricity
88- 93 F6.1 km/s Ulsr Space velocity in radial direction
relative to LSR
95-100 F6.1 km/s Vlsr Space velocity in tangential direction
relative to LSR
102-107 F6.1 km/s Wlsr Space velocity in vertical direction
relative to LSR
111-115 F5.1 km/s vlsr Speed relative to LSR
[= sqrt(U2+V2+W2)]
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Note (1): Parameters form Hipparcos catalogue, Cat. I/239.
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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- 10 A10 --- Star Star name (Sun/Moon or HIP NNNNNN)
12- 15 I4 --- Line Line No. (cf. Takeda et al. 2005,
Cat. J/PASJ/57/27)
17- 21 F5.2 --- Elem 26.00 for Fe I, 26.01 for Fe II
23- 30 F8.3 0.1nm lambda Line wavelength
32- 36 F5.3 eV EP(low) Excitation potential of the lower level
38- 43 F6.3 --- loggf log(gf) value
45- 49 F5.1 0.1pm EW ?=0 Fe line equivalent width
51- 54 F4.2 --- A(Fe) ?=0 Line-by-line Fe abundance
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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- 6 I6 --- HIP HIP (Cat. I/239) number
8- 13 F6.1 K Teff (standard) effective temperature
15- 19 F5.3 [cm/s2] logg (standard) logarithmic surface gravity
21- 24 F4.2 km/s vt (standard) microturbulent velocity
26- 31 F6.3 [Sun] [Fe/H]s (standard) Fe abundance (A-7.50)
33- 38 F6.1 K DTeff Differential Teff relative to the Sun
(Teff☉=5761.0)
40- 45 F6.3 [cm/s2] Dlogg Differential logg relative to the Sun
(logg☉=4.435)
47- 51 F5.2 km/s Dvt Differential microturbulent velocity
relative to the Sun (vt☉=1.00)
53- 58 F6.3 --- D[Fe/H] Differential [Fe/H] relative to the Sun
([Fe/H]☉=-0.007)
60- 63 F4.2 mag VMAG Absolute visual magnitude (from table 1)
65- 69 F5.2 mag BC Bolometric correction (Alonso et al.'s,
1995A&A...297..197A 1995A&A...297..197A, table 4)
71- 74 F4.2 mag Mbol Bolometric magnitude (=VMAG+BC)
76- 81 F6.3 [solLum] logL Logarithmic luminosity
83- 86 F4.2 solMass Mass Stellar mass derived from evolution track
88- 92 F5.2 solMass E_Mass Possible error in Mass on the upper side
94- 97 F4.2 solMass e_Mass Possible error in Mass on the lower side
99-102 F4.2 solMass M(iso) Stellar mass derived from isochrones
104-107 F4.2 [cm/s2] logg(TLM) Theorerical logg derived from
Teff, L, and Mass
109-113 F5.2 [yr] logAge Stellar age derived from evolutionary
track (adopted)
115-119 F5.2 [yr] E_logAge Possible error in logAge on the upper side
121-124 F4.2 [yr] e_logAge Possible error in logAge on the lower side
126 A1 --- q_logAge [ABC] Reliability of age(trk)
(A: high, B: moderate, C: poor)
128-132 F5.2 [yr] logAge(iso) Stellar age derived from isochrones
(for reference)
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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- 6 I6 --- HIP HIP (Cat. I/239) number
9- 13 F5.2 km/s Vrm Macrobroadening velocity
(rotation + macroturbulence)
15- 20 F6.3 --- A(Si) Si abundance derived from 6080-6089 fit
21- 26 F6.3 --- A(Ti) Ti abundance derived from 6080-6089 fit
27- 32 F6.3 --- A(V) V abundance derived from 6080-6089 fit
33- 38 F6.3 --- A(Fe) Fe abundance derived from 6080-6089 fit
39- 44 F6.3 --- A(Co) Co abundance derived from 6080-6089 fit
45- 50 F6.3 --- A(Ni) Ni abundance derived from 6080-6089 fit
53- 58 F6.3 [Sun] [Si/H] A(Si)[star]-A(Si)[Sun/Moon=7.455]
60- 65 F6.3 [Sun] [Ti/H] A(Ti)[star]-A(Ti)[Sun/Moon=4.986]
67- 72 F6.3 [Sun] [V/H] A(V)[star] -A(V)[Sun/Moon=3.908]
74- 79 F6.3 [Sun] [Fe/H] A(Fe)[star]-A(Fe)[Sun/Moon=7.534]
81- 86 F6.3 [Sun] [Co/H] A(Co)[star]-A(Co)[Sun/Moon=4.798]
88- 93 F6.3 [Sun] [Ni/H] A(Ni)[star]-A(Ni)(Sun/Moon=6.367]
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP HIP (Cat. I/239) number
9 A1 --- q_EW(Li) [abx] Quality flag
(a: well, b: poor, x: indeterminable)
12- 16 F5.1 mA EW(Li) EW(Li 6708) computed from A(LTE)
(fitting solution)
20 A1 --- l_A(Li) [<] for the upper-limit case
21- 25 F5.2 --- A(Li) Non-LTE Li abundance (=A(LTE)+d(NLTE))
28- 32 F5.2 --- d(NLTE) ? non-LTE correction
(not given for the upper-limit case)
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Acknowledgements:
Yoichi Takeda, takedayi(at)cc.nao.ac.jp
(End) Patricia Vannier [CDS] 02-Apr-2007