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J/AJ/135/564     Photometry and spectroscopy of BHB candidates    (Brown+, 2008)

The Century Survey Galactic Halo Project. III. A complete 4300°2 survey of blue horizontal branch stars in the metal-weak thick disk and inner halo. Brown W.R., Beers T.C., Wilhelm R., Prieto C.A., Geller M.J., Kenyon S.J., Kurtz M.J. <Astron. J., 135, 564-574 (2008)> =2008AJ....135..564B
ADC_Keywords: Stars, early-type ; Stars, horizontal branch ; Photometry, infrared ; Spectroscopy Keywords: Galaxy: halo - Galaxy: stellar content - stars: early-type - stars: horizontal-branch Abstract: We present a complete spectroscopic survey of 2414 2MASS-selected blue horizontal branch (BHB) candidates selected over 4300°2 of the sky. We identify 655 BHB stars in this non-kinematically selected sample. We calculate the luminosity function of field BHB stars, and find evidence for very few hot BHB stars in the field. Description: Spectroscopic observations were obtained with the FAST spectrograph on the Whipple 1.5m Tillinghast telescope. Observations were obtained over the course of 48 nights in 2004 and 2005. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 92 2414 Photometry table3.dat 72 2414 Spectroscopic and Stellar Parameters
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) J/AJ/126/1362 : Century Survey Galactic Halo Project. I. (Brown+, 2003) J/AJ/130/1097 : BHB stars in Century Survey Galactic Halo Project (Brown+, 2005) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [CHSS] 6- 9 I4 --- CHSS Century Halo Star Survey number (CHSS NNNN in Simbad) 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 Declinatin (J2000) 23- 24 I2 deg DEd Degree of Declination (J2000) 26- 27 I2 arcmin DEm Arcminute of Declination (J2000) 29- 30 I2 arcsec DEs Arcsecond of Declination (J2000) 32- 36 F5.2 mag Jmag Extinction corrected 2MASS J band magnitude 38- 42 F5.3 mag e_Jmag Uncertainty in Jmag 44- 48 F5.2 mag J-H Extinction corrected 2MASS J-H color index 50- 53 F4.2 mag e_J-H Uncertainty in J-H 55- 59 F5.2 mag H-K Extinction corrected 2MASS H-K color index 61- 64 F4.2 mag e_H-K Uncertainty in H-K 66- 70 F5.3 mag E(B-V) Schlegel et al. (1995) reddening value 72- 78 F7.3 deg GLON Galactic longitude 80- 86 F7.3 deg GLAT Galactic latitude 88- 92 F5.2 mag BV Extinction corrected (B-V) prediction (1)
Note (1): From 2MASS photometry and Balmer line strengths (and SDSS photometry, where available).
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [CHSS] 6- 9 I4 --- CHSS Century Halo Star Survey number (CHSS NNNN in Simbad) 11- 14 I4 km/s RV Heliocentric radial velocity 16- 18 I3 km/s e_RV Uncertainty in RVel 20- 23 F4.1 --- SpT ? Numeric spectral type (1) 25- 28 F4.1 --- e_SpT ? Uncertainty in SpT 30- 33 I4 K Teff ? Effective temperature 35- 38 F4.2 [cm/s] log(g) ? Log of surface gravity 40- 44 F5.2 [-] [Fe/H] ? Metallicity relative to the Sun 46- 50 A5 --- Class Classification (2) 52- 56 F5.2 mag VMAG ? Absolute V band magnitude 58- 61 F4.2 mag e_VMAG ? Uncertainty in VMag 63- 67 F5.2 kpc Dist ? Estimated heliocentric distance 69- 72 F4.2 kpc e_Dist ? Uncertainty in Dist
Note (1): Where B0=10, A0=20, F0=30, and so forth. Note (2): Classification, defined as follows: BHB = blue horizontal branch star; BHB/A = possible blue horizontal branch star with [Fe/H]>-0.6; A = high surface gravity, early A-type star, DA = DA white dwarf; sd = subdwarf.
History: From electronic version of the journal References: Brown et al., Paper I 2003AJ....126.1362B, Cat. J/AJ/126/1362 Brown et al., Paper II 2005AJ....130.1097B, Cat. J/AJ/130/1097
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 03-Nov-2009
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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