J/A+A/480/91 Galactic disk stars vertical distribution. IV. (Soubiran+, 2008)
Vertical distribution of Galactic disk stars. IV.
AMR and AVR from clump giants.
Soubiran C., Bienayme O., Mishenina T.V., Kovtyukh V.V.
<Astron. Astrophys. 480, 91 (2008)>
=2008A&A...480...91S 2008A&A...480...91S
ADC_Keywords: Stars, nearby ; Space velocities ; Abundances, [Fe/H] ;
Stars, distances
Keywords: stars: kinematics - stars: fundamental parameters - Galaxy: disk -
Galaxy: structure - solar neighbourhood
Abstract:
We present the parameters of 891 stars, mostly clump giants, including
atmospheric parameters, distances, absolute magnitudes, spatial
velocities, galactic orbits and ages. One part of this sample consists
of local giants, within 100pc, with atmospheric parameters either
estimated from our spectroscopic observations at high resolution and
high signal-to-noise ratio, or retrieved from the literature. The
other part of the sample includes 523 distant stars, spanning
distances up to 1 kpc in the direction of the North Galactic Pole, for
which we have estimated atmospheric parameters from high resolution
but low signal-to-noise Echelle spectra. This new sample is
kinematically unbiased, with well-defined boundaries in magnitude and
colours. We revisit the basic properties of the Galactic thin disk as
traced by clump giants. We find the metallicity distribution to be
different from that of dwarfs, with fewer metal-rich stars. We find
evidence for a vertical metallicity gradient of -0.31dex/kpc and for
a transition at 4-5Gyr in both the metallicity and velocities. The
age - metallicity relation (AMR), which exhibits a very low
dispersion, increases smoothly from 10 to 4Gyr, with a steeper
increase for younger stars. The age-velocity relation (AVR) is
characterized by the saturation of the V and W dispersions at 5Gyr,
and continuous heating in U.
Description:
Data and stellar parameters compiled for the reference library used
with the TGMET code in file 'table1'. Parameters of the 891 stars in
file 'table2'.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 81 724 The TGMET library
table2.dat 109 891 Stellar parameters
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See also:
J/A+A/398/141 : Vertical distribution of galactic disk stars (Soubiran+, 2003)
III/251 : ELODIE library V3.1 (Prugniel+ 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name HD/BD number (or Sun)
12- 19 I08 --- DataSet Dataset in ELODIE archive (YYYYMMDD)
21- 24 I04 --- Run Running number of the spectrum within dataset
26- 28 I3 --- S/N Signal-to-noise at 550nm
30- 36 F7.2 km/s HRV Heliocentric radial velocity
38- 41 I4 K Teff ? Effective temperature
43- 46 F4.2 [cm/s2] logg ? Decimal logarithm of gravity
48- 52 F5.2 [Sun] [Fe/H] ? Metallicity
54- 59 F6.3 mag VMAG ? Absolute V magnitude
61 I1 --- q_Teff [0/4] Quality flag for Teff (1)
62 I1 --- q_[Fe/H] [0/4] Quality flag for [Fe/H] (1)
63 I1 --- q_VMAG [0/4] Quality flag for VMAG (1)
65- 69 F5.3 mag B-V Johnson B-V colour
71- 81 A11 --- SpType MK spectral type
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Note (1): Quality flag: 0 = data not available, 1 = poor, ... 4 = high
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name HD or TYC number
13- 18 F6.3 mag VMAG Absolute magnitude in V
20- 24 F5.3 mag B-V Johnson B-V colour
26- 30 F5.2 [Sun] [Fe/H] Metallicity
32- 37 F6.1 km/s Uvel Galactic radial velocity (1)
39- 44 F6.1 km/s Vvel Galactic rotational velocity (1)
46- 50 F5.1 km/s Wvel Galactic vertical velocity (1)
52- 55 F4.2 kpc Rmin Perigalactic distance of galactic orbit
57- 61 F5.2 kpc Rmax Apogalactic distance of galactic orbit
63- 66 F4.2 kpc Zmax Maximum distance from galactic plane
68- 71 F4.2 -- ecc Eccentricity of galactic orbit
73- 76 I4 pc Dist Distance from the Sun
78- 82 F5.2 Gyr Age ? Age
84- 87 F4.2 Gyr e_Age ? Error on Age
89- 92 F4.2 --- Pthin Thin disk membership probability
94- 97 F4.2 --- Pthick Thick disk membership probability
99-102 F4.2 --- Pher Hercules stream membership probability
104-107 F4.2 --- Phalo Halo membership probability
109 A1 --- bin [b] Binarity flag
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Note (1): The three components of galactic velocity (U,V,W) are given with
respect to the Sun, the U axis pointing towards the Galactic Center.
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Acknowledgements:
Caroline Soubiran, Caroline.Soubiran(at)obs.u-bordeaux1.fr
References:
Soubiran et al., Paper I 2003A&A...398..141S 2003A&A...398..141S, Cat. J/A+A/398/141
Siebert et al., Paper II 2003A&A...399..531S 2003A&A...399..531S
Bienayme et al., Paper III 2006A&A...446..933B 2006A&A...446..933B
(End) Caroline Soubiran [LAB], Patricia Vannier [CDS] 03-Jan-2008