J/MNRAS/340/304 [X/Fe] of Galactic disc F and G dwarfs (Reddy+, 2003)
The chemical compositions of Galactic disc F and G dwarfs.
Reddy B.E., Tomkin J., Lambert D.L., Prieto C.A.
<Mon. Not. R. Astron. Soc. 340, 304 (2003)>
=2003MNRAS.340..304R 2003MNRAS.340..304R
ADC_Keywords: Stars, dwarfs; Stars, F-type; Stars, G-type; Abundances, peculiar
Keywords: stars: abundances - stars: atmospheres -
stars: fundamental parameters - stars: kinematics -
Galaxy: abundances - Galaxy: evolution
Abstract:
Photospheric abundances are presented for 27 elements from carbon to
europium in 181 F and G dwarfs from a differential local thermodynamic
equilibrium (LTE) analysis of high-resolution and high signal-to-noise
ratio spectra. Stellar effective temperatures (Teff) were adopted
from an infrared flux method calibration of Stroemgren photometry.
Stellar surface gravities (g) were calculated from Hipparcos
parallaxes and stellar evolutionary tracks. Adopted Teff and g values
are in good agreement with spectroscopic estimates. Stellar ages were
determined from evolutionary tracks. Stellar space motions (U, V, W)
and a Galactic potential were used to estimate Galactic orbital
parameters. These show that the vast majority of the stars belong to
the Galactic thin disc.
Description:
All the observations were made at the Harlan J. Smith 2.7-m telescope
at McDonald Observatory, using the 2dcoude echelle spectrometer (Tull
et al., 1995PASP..107..251T 1995PASP..107..251T) with a 2048x2048 pixel Tektronix
charge-coupled device (CCD) as detector.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 65 181 Atmospheric parameters and kinematic data for
the programme stars
table5.dat 84 181 Abundance ratios [X/Fe] for elements from
C to Ti for the programme stars
table6.dat 90 181 Abundance ratios [X/Fe] for elements from
V to Eu for the programme stars
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See also:
J/A+A/326/751 : Chemical composition of halo and disk stars (Nissen+, 1997)
J/A+AS/141/491 : Chemical composition of halo and disk stars (Nissen+, 2000)
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
8- 11 I4 K Teff Effective temperature
13- 16 F4.2 [cm/s2] logg Surface gravity
18- 22 F5.2 [Sun] [Fe/H] Metallicity
24- 29 F6.1 km/s UVel LSR U velocity
31- 35 F5.1 km/s VVel LSR V velocity
37- 41 F5.1 km/s WVel LSR W velocity
43- 47 F5.2 kpc Rm Mean galactic distance (1)
49- 53 F5.3 kpc Zmax Maximum distance from the Galactic plane
55- 59 F5.3 --- ecc Orbital eccentricity
61- 65 F5.2 [Gyr] logt9 ? Stellar age
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Note (1): Rm=(Rp+Ra)/2, where Rp and Ra are the peri- and apogalactic
distances, respectively
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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 --- HD HD number
8- 12 F5.2 [Sun] [C/Fe] ? C abundance relative to iron
14- 18 F5.2 [Sun] [N/Fe] ? N abundance relative to iron
20- 23 F4.2 [Sun] [O/Fe] ? O abundance relative to iron
25- 29 F5.2 [Sun] [O/Fe]n ? O abundance relative to iron,
not corrected for NLTE
31- 35 F5.2 [Sun] [Na/Fe] ? Na abundance relative to iron
37- 41 F5.2 [Sun] [Mg/Fe] ? Mg abundance relative to iron
43- 47 F5.2 [Sun] [Al/Fe] ? Al abundance relative to iron
49- 53 F5.2 [Sun] [Si/Fe] ? Si abundance relative to iron
55- 60 F6.2 [Sun] [S/Fe] ? S abundance relative to iron
62- 66 F5.2 [Sun] [K/Fe] ? K abundance relative to iron
68- 72 F5.2 [Sun] [Ca/Fe] ? Ca abundance relative to iron
74- 78 F5.2 [Sun] [Sc/Fe] ? Sc abundance relative to iron
80- 84 F5.2 [Sun] [Ti/Fe] ? Ti abundance relative to iron
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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 --- HD HD number
8- 12 F5.2 [Sun] [V/Fe] ? V abundance relative to iron
14- 18 F5.2 [Sun] [Cr/Fe] ? Cr abundance relative to iron
20- 24 F5.2 [Sun] [Mn/Fe] ? Mn abundance relative to iron
26- 30 F5.2 [Sun] [Co/Fe] ? Co abundance relative to iron
32- 36 F5.2 [Sun] [Ni/Fe] ? Ni abundance relative to iron
38- 42 F5.2 [Sun] [Cu/Fe] ? Cu abundance relative to iron
44- 48 F5.2 [Sun] [Zn/Fe] ? Zn abundance relative to iron
50- 54 F5.2 [Sun] [Sr/Fe] ? Sr abundance relative to iron
56- 60 F5.2 [Sun] [Yr/Fe] ? Yr abundance relative to iron
62- 66 F5.2 [Sun] [Ba/Fe] ? Ba abundance relative to iron
68- 72 F5.2 [Sun] [Zr/Fe] ? Zr abundance relative to iron
74- 78 F5.2 [Sun] [Ce/Fe] ? Ce abundance relative to iron
80- 84 F5.2 [Sun] [Nd/Fe] ? Nd abundance relative to iron
86- 90 F5.2 [Sun] [Eu/Fe] ? Eu abundance relative to iron
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History:
From electronic version of the journal
(End) Patricia Bauer [CDS] 24-Jun-2003