J/A+A/525/A90 Thick disc vertical properties (Katz+, 2011)
Probing the Galactic thick disc vertical properties and interfaces.
Katz D., Soubiran C., Cayrel R., Barbuy B., Friel E., Bienayme O.,
Perrin M.-N.
<Astron. Astrophys. 525, A90 (2011)>
=2011A&A...525A..90K 2011A&A...525A..90K
ADC_Keywords: Stars, nearby ; Photometry, infrared ; Space velocities ;
Proper motions ; Abundances ; Photometry, UBV
Keywords: Galaxy: disk - stars: abundances - Galaxy: abundances
Abstract:
This work investigates the properties (metallicity and kinematics) and
interfaces of the Galactic thick disc as a function of height above
the Galactic plane. The main aim is to study the thick disc in a place
where it is the main component of the sample.
We take advantage of former astrometric work in two fields of several
square degrees in which accurate proper motions were measured down to
V-magnitudes of 18.5 in two directions, one near the north galactic
pole and the other at a galactic latitude of 46° and galactic
longitude near 0°. Spectroscopic observations have been acquired
in these two fields for a total of about 400 stars down to magnitude
18.0, at spectral resolutions of 3.5 to 6.25Å. The spectra have
been analysed with the code ETOILE, comparing the target stellar
spectra with a grid of 1400 reference stellar spectra. This comparison
allowed us to derive the parameters effective temperature, gravity,
[Fe/H] and absolute magnitude for each target star.
Description:
Tables A1, A2 and A3: coordinates and parameters of the 346 CARELEC
and CFHT program stars analysed in this study.
Table B1: parameters of the 1398 ELODIE reference spectra used to
derive the stellar characteristics of the program stars.
Tables B2 and B3: parameters of the 45 CARELEC validation stars and 46
CFHT validation stars used to assess the accuracy and precision of the
stellar atmospheric parameters derivation method. It should be noted
that 2 stars "of" M71 (KC-124, KC-223) and 3 stars "of" M5 (I-52,
III-44 and IV-61) discussed in the article but considered as not
belonging to these clusters are not listed in table B3.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 101 346 Program stars coordinates and magnitudes
tablea2.dat 45 346 Program stars stellar parameters
tablea3.dat 80 346 Program stars metallicities, positions, velocities
tableb1.dat 35 1398 Elodie library reference stars
tableb2.dat 35 45 CARELEC validation stars
tableb3.dat 39 46 CFHT validation stars
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See also:
B/pastel : The PASTEL catalogue (Soubiran+, 2010)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Designation (FMN-NNNNNN;
<[KSC2011] FMN-NNNNNN> in Simbad)
12- 18 A7 --- Spectro Spectrograph: CARELEC, CFHT or BOTH
20- 26 A7 --- ExpID Id of the exposure (could be several
exposures)
28- 29 I2 h RAh Right ascension (J2000)
31- 32 I2 min RAm Right ascension (J2000)
34- 38 F5.2 s RAs Right ascension (J2000)
40 A1 --- DE- Declination sign (J2000)
41- 42 I2 deg DEd Declination (J2000)
44- 45 I2 arcmin DEm Declination (J2000)
47- 50 F4.1 arcsec DEs Declination (J2000)
52- 56 F5.2 mag Vmag Photographic V apparent magnitude
58- 61 F4.2 mag B-V ? B-V photographic colour index
63- 66 F4.2 mag V-I ? V-I colour index
68- 73 F6.3 mag Jmag 2MASS J apparent magnitude
75- 80 F6.3 mag Hmag 2MASS H apparent magnitude
82- 87 F6.3 mag Ksmag ? 2MASS Ks apparent magnitude
89- 94 F6.1 mas/yr pmRA Proper motion along right ascension
96-101 F6.1 mas/yr pmDE Proper motion along declination
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Designation
12- 15 I4 K Teff Effective temperature
17- 20 F4.2 [cm/s2] logg Logarithm of the surface gravity
22- 26 F5.2 [Sun] [Fe/H] Metallicity
28- 32 F5.2 mag VMAG Absolute visual magnitude
34- 40 F7.2 km/s RV ? Radial velocity
42- 45 I4 K Teff1 ? Effective temperature from SDSS photometry
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Designation
12- 16 F5.2 [Sun] [Fe/H] Metallicity
18- 24 F7.1 pc d Distance (from the Sun)
26- 32 F7.1 pc X Galactic position X
34- 40 F7.1 pc Y Galactic position Y
42- 48 F7.1 pc Z Galactic position Z
50- 56 F7.1 km/s Uvel ? Galactic velocity U (1)
58- 64 F7.1 km/s Vvel ? Galactic velocity V
66- 72 F7.1 km/s Wvel ? Galactic velocity W
74- 80 F7.1 km/s U-W ? U(cos47) - W(sin47)
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Note (1): U positive toward the Galactic center
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Byte-by-byte Description of file: tableb1.dat tableb2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Designation
12- 16 I5 K Teff Effective temperature (1)
18- 22 F5.2 [cm/s2] logg Logarithm of the surface gravity (1)
24- 28 F5.2 [Sun] [Fe/H] ? Metallicity (1)
30- 35 F6.3 mag VMAG ? Absolute visual magnitude (1)
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Note (1): The stellar parameters have been derived from the PASTEL
catalogue: Soubiran et al., 2010, Cat. B/pastel .
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Byte-by-byte Description of file: tableb3.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Designation
12 I1 --- Nspe Number of spectra recorded
14- 17 I4 K Teff Effective temperature (1)
19- 22 F4.2 [cm/s2] logg Logarithm of the surface gravity (1)
24- 28 F5.2 [Sun] [Fe/H] Metallicity (1)
30- 34 F5.2 mag Vmag Apparent visual magnitude (1)
36- 39 F4.2 mag B-V ? B-V colour index (1)
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Note (1): Stellar parameters for CFHT observations of validation stars
of the globular clusters:
* M5: identification names, V and B-V are from Buonanno et al.
(1981MNRAS.196..435B 1981MNRAS.196..435B); stellar parameters Teff, logg, are interpolated
within values determined by Ramirez & Cohen (2003AJ....125..224R 2003AJ....125..224R) for
stars from the tip of the RGB down to the TO.
* M71: identification names, V and B-V are from Arp & Hartwick
(1971ApJ...167..499A 1971ApJ...167..499A). Stellar parameters are interpolated within
values determined by Cohen et al. (2001AJ....122.1420C 2001AJ....122.1420C) for stars from
the tip of the RGB down to the TO, for which a metallicity [Fe/H]=-0.7
was found. Stars indicated by KC, S are on the numbering system of
Cudworth (1985AJ.....90...65C 1985AJ.....90...65C).
* M67: identifications are from Johnson & Sandage (1955ApJ...121..616J 1955ApJ...121..616J)
and V and B-V are from Montgomery et al. (1993, Cat. J/AJ/106/181);
stellar parameters are interpolated in calculations by VandenBerg &
Clem (2003AJ....126..778V 2003AJ....126..778V), where Teff values are from calibrations
by Alonso et al. (1999A&AS..140..261A 1999A&AS..140..261A) and Sekiguchi & Fukugita
(2000AJ....120.1072S 2000AJ....120.1072S) for a metallicity [Fe/H]=0.0 (An et al.,
2009ApJ...700..523A 2009ApJ...700..523A).
* M92: Identification names, V and B-V are from Sandage & Walker
(1966ApJ...143..313S 1966ApJ...143..313S) and Buonanno et al. (1983A&AS...53....1B 1983A&AS...53....1B), and
F means Fagerholm. Stellar parameters are interpolated within values
by Sneden et al. (2000AJ....120.1351S 2000AJ....120.1351S).
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Acknowledgements:
David Katz, david.katz(at)obspm.fr
(End) D. Katz [Observatoire de Paris], Patricia Vannier [CDS] 29-Dec-2010