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J/AJ/103/267      Spectrocopy of hot stars in galactic halo  (Beers+ 1992)

Spectrocopy of hot stars in the galactic halo Beers T.C., Preston G.W., Shectman S.A., Doinidis S.P., Griffin K.E. <Astron. J. 103, 267 (1992)> =1992AJ....103..267B
ADC_Keywords: Stars, metal-deficient ; Stars, halo ; Spectroscopy Abstract: The paper presents spectroscopy for 769 hot stars from the HK objective-prism/interference-filter survey of Beers et al. (1985), 193 of which have also available broadband UBV colors. When available, photometric information is used to obtain estimates of the surface temperature for degenerates and for O- and B-type subdwarfs, based on previously derived calibrations. Several extremely hot (T(eff) greater than 50,000 K) He-rich sdO stars are identified. Out of 769 stars in this sample, 551 are clearly identified on the basis of their Balmer line profiles as field horizontal-branch (FHB) or mid-to late-type A stars. The A stars exhibit rotation and line-of-sight dispersion consistent with membership in the galactic thick disk. The FHB stars exhibit kinematic properties which suggest a transition from thick disk to halo. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tables4.dat 140 768 Results (tables 4a to 4e) position.dat 139 753 Accurate positions (from B. Skiff)
See also: J/AJ/87/1515 : UBV photometry of AB stars in halo (Pier, 1982) J/ApJS/53/791 : Spectroscopy of AB stars in halo (Pier, 1983) J/AJ/90/2089 : Stars of very low metal abundance. (Beers+, 1985) J/PASP/102/1392 : UBV photometry from HK survey. (Doinidis+ 1990) J/PASP/103/973 : Photoelectric UBV from HK survey. (Doidinis+ 1991) J/ApJS/76/1001 : UBV photometry of HK survey stars (Preston+, 1991) J/AJ/103/1987 : Stars of very low metal abundance (Beers+ 1992) J/AJ/108/268 : HK survey emission-line candidates positions (Beers+ 1994) J/AJ/108/538 : Metal-poor MS stars UBV photometry (Preston+ 1994) J/AJ/112/1188 : HK survey emission-line candidates (Beers+ 1996) J/AJ/117/2329 : Spectroscopy of hot stars in the halo. (Wilhelm+, 1999) J/ApJS/123/639 : UBV photometry of metal-weak candidates (Norris+, 1999) Byte-by-byte Description of file: tables4.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [CS] (Curtis Schmidt) 4- 12 A9 --- BPS-CS Star Identification (Field and number) 14- 15 I2 h RA50h Right Ascension 1950 (hours) 17- 18 I2 min RA50m Right Ascension 1950 (minutes) 20- 23 F4.1 s RA50s Right Ascension 1950 (seconds) 25 A1 . DE50- Declination 1950 (sign) 26- 27 I2 deg DE50d Declination 1950 (degrees) 29- 30 I2 arcmin DE50m Declination 1950 (minutes) 32- 33 I2 arcsec DE50s Declination 1950 (seconds) 35- 39 F5.1 deg GLON Galactic longitude 41- 45 F5.1 deg GLAT Galactic latitude 47- 51 F5.2 mag Vmag ? Johnson magnitude 53- 57 F5.2 mag B-V ? Johnson (B-V) color 59- 63 F5.2 mag U-B ? Johnson (U-B) color 65- 68 F4.2 mag E(B-V) B-V excess 70- 73 I4 km/s RV ? Heliocentric Radial velocity 75 A1 --- Det [RF] Detector Identification: R=Reticon; F=2D-Frutti 77- 81 F5.2 0.1nm HP ? Balmer line equivalent width index HP (1) 83- 87 F5.2 0.1nm D0.2 ? H-δ breadth D(0.2) at 20% below local continuum (Angstroms) 89- 93 F5.2 --- Rc [0,1]? Line depth of H-δ (Rc) relative to local continuum 95- 99 F5.2 0.1nm KP ? CaII K equivalent width index KP (Angstroms) 101-105 F5.2 0.1nm W4026 ? Equivalent width of HeI 4026Å (Angstroms) 107-111 F5.2 0.1nm W4387 ? Equivalent width of HeI 4387Å (Angstroms) 113-117 F5.2 0.1nm W4471 ? Equivalent width of HeI 4471Å (Angstroms) 119 A1 --- T [a-e] Original table, related to class (2) 121-125 A5 --- Class Classification of stellar type from objective-prism spectrum (3) 127-132 A6 --- Type Stellar type from digital spectrum and photometry 134-138 F5.2 [K] logTe ? Estimate of log(Teff) 140 A1 --- D [D] for Duplicated star -- see the list in the "Duplicated stars" section below.
Note (1): HP is an average of H lines: HP = -0.276 + 0.5Hδ + 0.588Hγ Note (2): Table 4 is made of 5 sub-tables 4a to 4e, containing the following classes of stars: a = Degenerate Stars; b = Subdwarf O and B Stars; c = FHB (Field Horizontal-Branch star), A, and FHB/A Stars; d = CMP (composite) stars; e = Narrow-lined B stars Note (3): HK objective-prism classification (table 2): C = Continuum spectrum: no line present D = Degenerate spectrum, extremely broad Hε B = B-type spectrum, very blue continuum, weak Hε AB = AB-type spectrum, blue continuum, strong Hε, no CaII-K visible A = A-type spectrum, strong Hε, weak CaII-K visible MP = Metal-poor F- or G-type spectrum, extremely weak CaII H and K E = Emission noticed in spectrum P = Peculiarities noticed in spectrum
Byte-by-byte Description of file: position.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [CS] (Curtis Schmidt) 4- 12 A9 --- BPS-CS Star Identification (Field and number) 25- 26 I2 h RAh ? Right Ascension J2000 (hours) (4) 28- 29 I2 min RAm ? Right Ascension J2000 (minutes) (4) 31- 35 F5.2 s RAs ? Right Ascension J2000 (seconds) (4) 37 A1 --- DE- Declination J2000 (sign) (4) 38- 39 I2 deg DEd ? Declination J2000 (degrees) (4) 41- 42 I2 arcmin DEm ? Declination J2000 (minutes) (4) 44- 47 F4.1 arcsec DEs ? Declination J2000 (seconds) (4) 49 A1 --- s [USMbd] Source of position (4) 51- 55 F5.2 mag Vmag ? Approximative magnitude 56 A1 --- n_Vmag [V] Band for magnitude (V) 59- 67 A9 --- SpType MK spectral type 86-139 A54 --- Note Note about the star identification (B. Skiff)
Note (4): Duplicated stars (listed in the "Duplicated stars" section below) are not included. One star (BPS-CS 22184-5) could not be retrieved. Sources of the positions are: b = USNO-B1.0 (I/284) g = GSC-2.3 (I/305) M = 2MASS (II/246) S = SDSS DR7 (II/294) or DR8 (II/306) U = UCAC2 (I/289, mostly), or UCAC4 (I/322)
Duplicated stars: CS 22169- 1 = CS 22190- 9 CS 22173- 1 = CS 30494- 1 CS 22173- 24 = CS 30494- 32 CS 22173- 33 = CS 30494- 50 CS 22875- 2 = CS 22881- 69 CS 22886- 32 = CS 29512- 44 CS 22888- 17 = CS 30493- 27 (Note: Radial velocities are different) CS 22897-112 = CS 22956- 6 (Note: Radial velocities are different) CS 22937- 22 = CS 30492- 42 CS 22937- 36 = CS 30492- 62 CS 22937- 82 = CS 30492-118 CS 22937- 17 = CS 30492- 29 CS 22937- 65 = CS 30492- 98 CS 22937- 25 = CS 30492- 46 (Note: Radial velocities are different) CS 22937- 87 = CS 30492-126 (Note: Radial velocities are different)
(End) Francois Ochsenbein [CDS] 04-May-1993
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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