J/A+A/409/251 Li abundances and velocities in F and G stars (Mallik+, 2003)
Lithium and rotation in F and G dwarfs and subgiants
Mallik S.V., Parthasarathy M., Pati A.
<Astron. Astrophys. 409, 251 (2003)>
=2003A&A...409..251M 2003A&A...409..251M
ADC_Keywords: Stars, dwarfs ; Stars, giant ; Stars, F-type ; Stars, G-type ;
Radial velocities ; Rotational velocities ; Abundances, peculiar
Keywords: stars: abundances - stars: late-type - stars: rotation
Abstract:
Lithium abundances have been determined in 127 F and G Pop I stars
based on new measurements of the equivalent width of the
λ6707Å Li I line from their high resolution CCD spectra.
Distances and absolute magnitudes of these stars have been obtained
from the Hipparcos Catalogue (I/239) and their masses and ages
derived, enabling us to investigate the behaviour of lithium as a
function of these parameters. Based on their location on the HR
diagram superposed on theoretical evolutionary tracks, the sample of
the stars has been chosen to ensure that they have more or less
completed their Li depletion on the main sequence.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 61 127 Star positions and magnitudes (from Simbad)
table1.dat 86 127 Stellar parameters and lithium abundances
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See also:
J/A+AS/126/21 : Velocities and duplicity of F-type dwarfs (Nordstroem+ 1997)
J/A+AS/118/545 : Rotational velocities of F dwarfs (Groot+, 1996)
J/A+A/371/943 : Li abundances for 185 main-sequence stars (Chen+, 2001)
J/A+A/363/239 : Li abundances in single giant stars (De Medeiros +, 2000)
J/A+AS/127/277 : Rotation and binary rate among giant F stars (Kunzli+ 1998)
J/AJ/105/2299 : Li abundance of solar-type stars. II. (Soderblom+, 1993)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HR]
4- 7 I4 --- HR HR name
15- 16 I2 h RAh Right ascension (J2000.0)
18- 19 I2 min RAm Right ascension (J2000.0)
21- 24 F4.1 s RAs Right ascension (J2000.0)
26 A1 --- DE- Declination sign (J2000.0)
27- 28 I2 deg DEd Declination (J2000.0)
30- 31 I2 arcmin DEm Declination (J2000.0)
33- 34 I2 arcsec DEs Declination (J2000.0)
38- 42 F5.2 mag Bmag ? B magnitude
44- 48 F5.2 mag Vmag ? V magnitude
50- 70 A21 --- SpType MK Spectral type
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- HR HR number
5 A1 --- n_HR [*] Note (1)
7- 12 A6 --- SpType MK Spectral type
14- 17 F4.2 mag B-V B-V colour index
19- 22 I4 K Teff Effective temperature
24- 27 F4.2 [cm/s2] logg ? Gravity surface
29- 33 F5.2 [Sun] [Fe/H] ? Metallicity
35- 37 F3.1 km/s Vturb ? Turbulent velocity
39- 43 F5.1 km/s vsini ? Rotational velocity
45- 50 F6.3 [solLum] logL ? Luminosity
52- 55 F4.2 solMass Mass ? Mass
57- 60 F4.1 Gyr Age ? Age
62 A1 --- l_EW(LiI+FeI) Limit flag on EW(LiI+FeI)
63- 67 F5.1 0.1nm EW(LiI+FeI) ? Li I + Fe I equivalent width
69- 72 F4.1 0.1nm EW(FeI) ? Fe I equivalent width
74 A1 --- l_EW(LiI) Limit flag on EW(LiI) (2)
75- 79 F5.1 0.1nm EW(LiI) Li I equivalent width
81 A1 --- l_logN(Li) Limit flag on logN(Li)
82- 86 F5.2 [Sun] logN(Li) Li abundance (relative to the Sun)
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Note (1): * denote rapidly rotating stars for which abundances were
determined by fitting synthetic spectra.
Note (2): Li EQWs quoted here are calculated from the synthetic fits.
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Acknowledgements: Sushma Mallik
(End) Patricia Bauer [CDS] 01-Sep-2003