Access to Astronomical Catalogues

← Click to display the menu
J/A+A/445/939     Metal-poor stars uvby-beta photometry. XI.   (Schuster+, 2006)

uvby-beta photometry of high-velocity and metal-poor stars. XI. Ages of halo and old disk stars. Schuster W.J., Moitinho, A., Marquez, A., Parrao, L., Covarrubias, E. <Astron. Astrophys. 445, 939 (2006)> =2006A&A...445..939S
ADC_Keywords: Stars, high-velocity ; Stars, metal-deficient ; Space velocities ; Photometry, uvby, beta ; Abundances, [Fe/H] ; Radial velocities Keywords: stars: fundamental parameters - Galaxy: evolution - Galaxy: formation - Galaxy: halo - Galaxy: kinematics and dynamics - Hertzsprung-Russell (HR) and C-M diagrams Abstract: New uvby-beta data are provided for 442 high-velocity and metal-poor stars; 90 of these stars have been observed previously by us, and 352 are new. When combined with our previous two photometric catalogues, the data base is now made up of 1533 high-velocity and metal-poor stars, all with photometry and complete kinematic data. Hipparcos, plus a new photometric calibration for Mv also based on the Hipparcos parallaxes, provide distances for nearly all of these stars; our previous photometric calibrations give values for E(b-y) and [Fe/H]. The [Fe/H],V(rot) diagram allows us to separate these stars into different Galactic stellar population groups, such as old-thin-disk, thick-disk, and halo. The X histogram, where X is our stellar-population discriminator combining V(rot) and [Fe/H], and contour plots for the [Fe/H],V(rot) diagram both indicate two probable components to the thick disk. Description: Table 1 lists the Stroemgren (uvby) and H-beta photometry observed at the San Pedro Martir observatory, Mexico, plus the number of independent uvby and H-beta observations, and Notes concerning the observing conditions, cross-reference identifications, stars repeated within our various photometric catalogues, photometric contamination, red subgiant/giant stars, and photometric variability. Table 2 contains those high-velocity and metal-poor stars of our three photometric catalogues not classified as main sequence (MS) or turnoff (TO) stars according to the c0,(b-y)0 diagram (Fig. 6) of Paper X (Schuster et al., 2004, Cat. J/A+A/422/527). Table 3 gives the input kinematic data for the Galactic velocities of this paper: right ascension, declination, radial velocity, proper motions, distance, epoch, and their respective errors. Table 4 contains the Galactic velocities (U',V',W'), their respective errors, the stellar distance and its error, dereddened uvby photometry, photometric [Fe/H] values, selected VMAG values, the X stellar-population discriminator, and numerical keys concerning the source of VMAG and binary stars. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 62 446 uvby-Hbeta data from San Pedro Martir table1.tex 122 1046 LaTeX version of table1 notes.dat 80 334 Individual notes to table1 table2.dat 52 57 Photometric stellar classifications table2.tex 84 131 LaTeX version of table2 table3.dat 111 1633 Input kinematic data table4.dat 130 1533 Output kinematic data plus distances, dereddened photometry, [Fe/H], selected VMAG, X, and keys for the VMAG values and binary stars
See also: II/180 : Metal-poor stars uvby-beta photometry. III. (Schuster+ 1989) J/A+AS/97/951 : Metal-poor stars uvby-beta photometry. VI. (Schuster+ 1993) J/A+AS/117/317 : Metal-poor stars uvby-beta photometry. VIII. (Schuster+ 1996) J/A+A/422/527 : Metal-poor stars uvby-beta photometry. X. (Schuster+ 2004) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Seq Internal number (SPG NNN) 9- 18 A10 --- Name External stellar designation (HD, G, LP, DM, LTT, LHS,...) 22- 27 F6.3 mag Vmag Johnson V magnitude 29- 33 F5.3 mag b-y Stroemgren colour index b-y 35- 40 F6.3 mag m1 Stroemgren metallicity index m1 41 A1 ---- u_m1 [)] Flag for less accurate value 43- 47 F5.3 mag c1 Stroemgren Balmer discontinuity index c1 48 A1 ---- u_c1 [)] Flag for less accurate value 50- 51 I2 --- o_uvby Number of independent observations in uvby 53- 57 F5.3 mag Hbeta ?=- Hbeta line index 59- 60 I2 --- o_Hbeta Number of independent observations in Hbeta 62 A1 --- n_Name [*] indicates a note in notes.dat
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Name 12- 80 A69 --- Note Text of the note (1)
Note (1): Stars with "++" have (b-y)≥0.5mag and c1≥0.35mag, the m1 and c1 values may be less accurate, due to non-linearity of the photometric transformation (m1 and c1 values in table1 have an uncertainty flag), stars with (b-y) c1 values close to these limits, but not both exceeding, have a note of "+". A D indicates duplicity.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 A3 --- Cat SN, SPC or SPG (G1) 5- 14 A10 --- Name Stellar designation (HD, G, LP, DM, LTT, LHS,...) 19- 23 F5.3 mag (b-y)0 De-reddened Stroemgren color index b-y (1) 25- 30 F6.3 mag c0 De-reddened Stroemgren Balmer discontinuity index c1 (1) 31 A1 --- u_c0 [)] Uncertainty flag on c0 33- 37 F5.2 [Sun] [Fe/H] ?=- Photometric metallicity 40- 46 A7 --- Class Photometric classification (3) 50- 52 A3 --- Notes [ABCD, ] Notes (2)
Note (1): b-y, and c1 have been corrected for the effect of interstellar reddening if E(b-y)≥0.015. Note (2): Notes have the following meaning: A = No photometric value for [Fe/H] B = Poorly determined value for [Fe/H] C = Red giant with a less accurate value for c0 D = Star which appears twice in this table Note (3): The following classes are defined: VMP = very metal poor TO = turn-off stars MS = main sequence stars BS = blue stragglers BS-TO = transition from blue-straggler to turnoff SG = subgiant stars RG = red giants HB = horizontal branch stars RHB-AGB = transition red-horizontal-branch to asymptotic-giant-branch BHB = blue horizontal branch SL = subluminous stars SL-BHB = transition from the blue-horizontal-branch to subluminous
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Seq Internal stellar designation (from the SN, SPC or SPG photometric catalogues) (G1) 9- 18 A10 --- Name External stellar designation (HD, G, LP, DM, LTT, LHS,...) 20- 21 I2 h RAq.h Right ascension (at epoch/equinox Equinox) 23- 24 I2 min RAq.m Right ascension (at epoch/equinox Equinox) 26- 30 F5.2 s RAq.s Right ascension (at epoch/equinox Equinox) 32 A1 --- DEq.- Declination sign (at epoch/equinox Equinox) 33- 34 I2 deg DEq.d Declination (at epoch/equinox Equinox) 36- 37 I2 arcmin DEq.m Declination (at epoch/equinox Equinox) 39- 43 F5.2 arcsec DEq.s Declination (at epoch/equinox Equinox) 45- 50 F6.1 yr Equinox Equinox of coordinates (2000.0 or 1950.0) 52- 57 F6.1 km/s RV Radial velocity 59- 66 F8.2 mas/yr pmRA Proper motion in right ascension 68- 75 F8.2 mas/yr pmDE Proper motion in right ascension 77- 80 F4.1 km/s e_RV Standard error of the radial velocity 82- 86 F5.2 mas/yr e_pmRA Standard error of the proper motion in right ascension 88- 92 F5.2 mas/yr e_pmDE Standard error of the proper motion in declination 94-101 F8.1 pc Dist Distance 103-111 F9.1 pc e_Dist Standard error of the distance
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Seq Internal stellar designation (from the SN, SPC or SPG photometric catalogues) (G1) 9- 18 A10 --- Name External stellar designation (HD, G, LP, DM, LTT, LHS,...) 20- 26 F7.2 km/s U'Vel Galactic velocity U corrected to the LSR 28- 34 F7.2 km/s V'Vel Galactic velocity V corrected to the LSR 36- 42 F7.2 km/s W'Vel Galactic velocity W corrected to the LSR 44- 49 F6.2 km/s e_U'Vel Standard error of the U' velocity 51- 56 F6.2 km/s e_V'Vel Standard error of the V' velocity 58- 63 F6.2 km/s e_W'Vel Standard error of the W' velocity 65- 70 F6.2 pc Dist Distance derived from the selected absolute magnitude 72- 77 F6.2 pc e_Dist Standard error of the distance 79- 84 F6.3 mag V0 V magnitude corrected for interstellar absorption (1) 86- 90 F5.3 mag (b-y)0 De-reddened Stroemgren color index b-y (1) 92- 97 F6.3 mag m0 De-reddened Stroemgren metallicity index m1 (1) 99-104 F6.3 mag c0 De-reddened Stroemgren Balmer discontinuity index c1 (1) 106-110 F5.2 [Sun] [Fe/H] Photometric metallicity (9.99=non-value) 112-117 F6.3 mag VMAG Selected absolute magnitude 119 A1 --- Key1 [1-3] Key for indicating source of VMAG (2) 121-128 F8.3 --- X -999.999=? Stellar population discriminator, a linear combination of [Fe/H] and V(rot) 130 A1 --- Key2 [1-4] Key for indicating binary stars (3)
Note (1): V, b-y, m1 and c1 have been corrected for the effect of interstellar reddening if E(b-y)≥0.015. Note (2): Key1 takes the following values: 1 = VMAG directly from Hipparcos with errors less than 10% 2 = VMAG from the photometric calibration 3 = VMAG less precise or from a less reliable source Note (3): Key2 takes the following values: 1 = Non-binary star 2 = Spectroscopic binaries (SB2 or dlsb) 3 = All other binary stars or stars with contaminated photometry 4 = Photometrically variable stars
Globla notes: Note (G1): Catalogues in which the stars are: SN: Schuster & Nissen, 1989A&A...221...65S and Cat. II/180 SPC: Schuster et al., 1993, Cat. J/A+AS/97/951 SPG: this paper
Acknowledgements: References: Schuster et al., Paper I 1988A&AS...73..225S Schuster et al., Paper II 1989A&A...221...65S Schuster et al., Paper III 1989A&A...222...69S, Cat. II/180 Allen et al., Paper IV 1991A&A...244..280A Nissen et al., Paper V 1991A&A...251..457N Schuster et al. Paper VI 1993A&AS...97..951S, Cat. J/A+AS/97/951 Marquez et al., Paper VII 1994A&AS..108..341M Schuster et al., Paper VIII 1996A&AS..117..317S, Cat. J/A+AS/117/317 Schuster et al., Paper IX 1997A&A...319..796S Schuster et al., Paper X 2004A&A...422..527S, Cat. J/A+A/422/527
(End) William Schuster [UNAM], Patricia Vannier [CDS] 20-Oct-2005
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact