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J/AJ/130/1097   BHB stars in Century Survey Galactic Halo Project (Brown+, 2005)

The Century Survey Galactic Halo Project. II. Global properties and the luminosity function of field blue horizontal branch stars. Brown W.R., Geller M.J., Kenyon S.J., Kurtz M.J., Allende Prieto C., Beers T.C., Wilhelm R. <Astron. J., 130, 1097-1110 (2005)> =2005AJ....130.1097B
ADC_Keywords: Stars, blue ; Stars, horizontal branch ; Photometry, SDSS ; Photometry, infrared Keywords: Galaxy: halo - Galaxy: stellar content - stars: horizontal-branch Abstract: We discuss a 175°2 spectroscopic survey for blue horizontal branch (BHB) stars in the Galactic halo. We use the Two Micron All Sky Survey (2MASS, II/246) and the Sloan Digital Sky Survey (SDSS) to select BHB candidates, and we find that the 2MASS and SDSS color selection is 38% and 50% efficient, respectively, for BHB stars. Our samples include one likely runaway B7 star 6kpc below the Galactic plane. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 66 257 Photometry table3.dat 75 257 Spectroscopic and stellar parameters
See also: : The Sloan Digital Sky Survey home page II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) J/AJ/126/1362 : Century Survey Galactic Halo Project. I. (Brown+, 2003) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [CHSS] 6- 9 I4 --- CHSS Source identifier (G1) 11- 12 I2 h RAh Hour of Right Ascension (J2000) 14- 15 I2 min RAm Minute of Right Ascension (J2000) 17- 20 F4.1 s RAs Second of Right Ascension (J2000) 22 A1 --- DE- Sign of the Declination (J2000) 23 I1 deg DEd Degree of Declination (J2000) 25- 26 I2 arcmin DEm Arcminute of Declination (J2000) 28- 29 I2 arcsec DEs Arcsecond of Declination (J2000) 31- 35 F5.2 mag Jmag ? 2MASS extinction-corrected J band magnitude 37- 41 F5.3 mag e_Jmag ? Uncertainty in Jmag 43- 47 F5.2 mag g'mag ? SDSS extinction-corrected g' band magnitude 49- 53 F5.3 mag e_g'mag ? Uncertainty in g'mag 55- 58 F4.2 mag E(B-V) Schlegel et al. (1998ApJ...500..525S) reddening value 60- 64 F5.2 mag B-V Predicted (B-V) color (2) 66 I1 --- BHB [0/1] Blue Horizontal Branch status (3)
Note (2): From 2MASS or SDSS photometry and Balmer line strengths (Brown et al., 2003AJ....126.1362B). Note (3): value 1 = is a BHB star, 0 = is not a BHB star.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [CHSS] 6- 9 I4 --- CHSS Source identifier (G1) 11- 15 F5.2 0.1nm KP ? The KP (Ca II) index 17- 21 F5.2 0.1nm HP2 ? The HP2 (Hδ) index 23- 26 F4.2 0.1nm GP ? The GP (G-Band) index 28- 33 F6.1 km/s HRV Heliocentric radial velocity 35- 38 F4.1 km/s e_HRV Uncertainty in HRV 40- 43 F4.1 --- SpType Spectral type code (2) 45- 47 F3.1 --- e_SpType Uncertainty in SpType 49- 52 I4 K Teff Effective temperature 54- 57 F4.2 [cm/s2] log(g) Log of the surface gravity 59- 63 F5.2 [Sun] [Fe/H] ? Log of Fe/H ratio relative to the Sun 65- 69 F5.2 kpc Dist Estimated distance 71- 75 F5.2 mag VMAG Absolute V band magnitude (3)
Note (2): Where B0=10, A0=20, F0=30, and so forth. Note (3): Corrected for reddening, given the estimated distance.
Global notes: Note (G1): The designation CHSS stands for Century Halo Star Survey and is chosen to be unique from previous surveys.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 11-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

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