J/A+A/535/A107 Spectroscopic survey of 479 thick disc stars (Kordopatis+, 2011)
A spectroscopic survey of thick disc stars outside the solar neighbourhood.
Kordopatis G., Recio-Blanco A., de Laverny P., Gilmore G., Hill V.,
Wyse R.F.G., Helmi A., Bijaoui A., Ordenovic C., Zoccali M., Bienayme O.
<Astron. Astrophys. 535, A107 (2011)>
=2011A&A...535A.107K 2011A&A...535A.107K
ADC_Keywords: Stars, nearby ; Positional data ; Space velocities ;
Abundances ; Effective temperatures ; Photometry
Keywords: Galaxy: evolution - Galaxy: kinematics and dynamics -
stars: abundances - methods: observational
Abstract:
In the era of large spectroscopic surveys, Galactic archaeology aims
to understand the formation and evolution of the Milky Way by means of
large datasets. In particular, the kinematic and chemical study of the
thick disc can give valuable information on the merging history of the
Milky Way. Our aim is to detect and characterise the Galactic thick
disc chemically and dynamically by analysing F, G and K stars, whose
atmospheres reflect their initial chemical composition.
We performed a spectroscopic survey of nearly 700 stars probing the
Galactic thick disc far from the solar neighbourhood towards the
Galactic coordinates (l∼277°, b∼47°). The derived effective
temperatures, surface gravities and overall metallicities were then
combined with stellar evolution isochrones, radial velocities and
proper motions to derive the distances, kinematics and orbital
parameters of the sample stars. The targets belonging to each Galactic
component (thin disc, thick disc, halo) were selected either on their
kinematics or according to their position above the Galactic plane,
and the vertical gradients were also estimated.
Description:
These tables contain all the parameters that have been computed, based
on the LR8 spectra of targets selected in order to investigate the
galactic thick disc outside the solar neighbourhood. The atmospheric
parameters and the signal-to-noise ratio (SNR) were computed using the
pipeline presented in Kordopatis et al. (2011A&A...535A.106K 2011A&A...535A.106K). The
line-of-sight distances were computed by projecting the atmospheric
parameters on the Yonsei-Yale isochrones.
The velocities and eccentricities were computed using the radial
velocities derived by cross-correlation of the spectra with a
synthetic mask, and using the proper motions of Ojha et al.
(1996A&A...311..456O 1996A&A...311..456O)
No selection has been made on SNR in these tables. A value of -999.99
is meaning that the data for that star is not available
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 100 479 Kinematic parameters of the targets
table2.dat 61 479 Atmospheric parameters of the targets
table4.dat 73 479 Positions and coordinates of the targets
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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- 3 I3 --- Seq Sequential number of the star
5- 12 F8.3 10mas/yr pmGlon ?=-999.990 Proper motion along galactic longitude
14- 21 F8.3 10mas/yr pmGlat ?=-999.990 Proper motion along galactic latitude
23- 27 F5.1 km/s HRV Heliocentric radial velocity
29- 31 F3.1 km/s e_HRV Error on radial velocity
33- 37 I5 km/s Uvel ?=-999 U cartesian velocity coordinate
w.r.t. the LSR
39- 42 I4 km/s e_Uvel ?=-999 Error on Uvel
44- 48 I5 km/s Vvel ?=-999 V cartesian velocity coordinate
w.r.t. the LSR
50- 53 I4 km/s e_Vvel ?=-999 Error on Vvel
55- 58 I4 km/s Wvel ?=-999 W cartesian velocity coordinate
w.r.t. the LSR
60- 63 I4 km/s e_Wvel ?=-999 Error on Wvel
65- 68 I4 km/s Vg.r ?=-999 Radial component VR of
galactocentric cylindrical velocity
70- 73 I4 km/s e_Vg.r ?=-999 Error on Vg.r
75- 79 I5 km/s Vphi ?=-999 Orthoradial component V_φ of
galactocentric cylindrical velocity
81- 84 I4 km/s e_Vphi ?=-999 Error on Vphi
86- 92 F7.2 --- ecc ?=-999.99 Eccentricity of the galactic orbit
94-100 F7.2 --- e_ecc ?=-999.99 Error on eccentricity
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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- 3 I3 --- Seq Sequential number of the star
5- 8 I4 K Teff Effective temperature
10- 12 I3 K e_Teff Error on effective temperature
14- 17 F4.2 [cm/s2] logg Surface gravity
19- 22 F4.2 [cm/s2] e_logg Error on surface gravity
24- 28 F5.2 [Sun] [M/H] Overall metallicity
30- 33 F4.2 [Sun] e_[M/H] Error on overall metallicity
35- 39 F5.2 mag Vmag Relative V magnitude
41- 45 F5.2 mag B-V ?=-9.99 B-V colour index
47- 51 F5.2 mag VMAG Absolute V magnitude
53- 56 F4.2 mag e_VMAG Error on the absolute V magnitude
58- 61 I4 --- SNR Measured signal-to-noise ratio
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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- 3 I3 --- Seq Sequential number of the star
5- 11 F7.3 deg Glon Galactic longitude
12- 18 F7.3 deg Glat Galactic latitude
20- 24 I5 pc Dist Line-of-sight distance
26- 29 I4 pc e_Dist Error on line-of-sight distance
31- 34 I4 pc X Heliocentric X position (toward galactic center)
36- 39 I4 pc e_X Error on the X position
41- 46 I6 pc Y Heliocentric Y position
48- 51 I4 pc e_Y Error on the Y position
53- 57 I5 pc Z Heliocentric Z position (toward galactic North)
59- 62 I4 pc e_Z Error on the Z position
64- 68 I5 pc R Galactocentric cylindrical R coordinate
70- 73 I4 pc e_R Error galactocentric cylindrical R coordinate
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Acknowledgements:
Georges Kordopatis, Georges.Kordopatis(at)oca.eu
(End) Patricia Vannier [CDS] 24-Oct-2011