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J/A+A/448/1001      Radial velocities of B stars in Sco-Cen    (Jilinski+, 2006)

Radial velocity measurements of B stars in the Scorpius-Centaurus association. Jilinski E., Daflon S., Cunba K., de la Raze R. <Astron. Astrophys. 448, 1001 (2006)> =2006A&A...448.1001J
ADC_Keywords: Clusters, open ; Stars, B-type ; Radial velocities Keywords: stars: early-type - stars: binaries: spectroscopic - stars: kinematics - stars: radial velocities - open clusters and associations: individual: Scorpius-Centaurus association Abstract: We derive single-epoch radial velocities for a sample of 56 B-type stars members of the subgroups Upper Scorpius, Upper Centaurus Lupus and Lower Centaurus Crux of the nearby Sco-Cen OB association. The radial velocity measurements were obtained by means of high-resolution echelle spectra via analysis of individual lines. The internal accuracy obtained in the measurements is estimated to be typically 2-3km/s, but depends on the projected rotational velocity of the target. Radial velocity measurements taken for 2-3 epochs for the targets HD120307, HD142990 and HD139365 are variable and confirm that the y are spectroscopic binaries, as previously identified in the literature. Spectral lines from two stellar components are resolved in the observed spectra of target stars HD133242, HD133955 and HD143018, identifying them as spectroscopic binaries. Description: A sample of 56 B-type stars from the Scorpius-Centaurus association was observed during observing runs in May 1620 and July 7, 2002, with the 1.52m telescope equipped with the FEROS echelle spectrograph with a CCD detector at the European Southern Observatory (ESO). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 77 67 Radial velocities of observed Sco-Cen OB stars
See also: III/213 : General Catalog of radial velocities (Barbier-Brossat+, 2000) J/A+A/356/541 : T Tauri stars in the Sco-Cen OB association (Koehler+, 2000) J/ApJS/82/117 : UBV and H-beta in Sco-Cen association (Slawson+, 1992) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 A3 --- Group Group (1) 5- 10 I6 --- HD HD number 11 A1 --- n_HD [AB] Multiplicity index on HD 13- 19 A7 --- SpType MK spectral type 21- 32 F12.4 d HJD Heliocentric Julian Date 34- 39 F6.1 km/s RV Radial velocity 41- 43 F3.1 km/s e_RV rms uncertainty on RV 45- 46 I2 --- n_RV Number of observations in RV 48- 52 F5.1 km/s RVgcrv ? GCRV (III/213) radial velocity 54- 56 F3.1 km/s e_RVgcrv ? rms uncertainty on RVgcrv 57 A1 --- n_RVgcrv [ABCDEI] Uncertainty code (2) 59- 61 I3 km/s vsini ? Rotational velocity 62 A1 --- r_vsini [ab] Reference for vsini (3) 64- 77 A14 --- Flag Duplicity (4)
Note (1): Groups as follows: LCC = Lower Centaurus Crux UCP = Upper Centaurus Lupus US = Upper Scorpius O = Other Note (2): Uncertainty code as follows: A = errors≤2.5km/s B = 2.5≤errors≤5.0km/s C = 5.0≤errors≤10km/s D = errors≥10km/s E = too uncertain Note (3): References as follows: a = from Glebocki & Stawikowski (2000, Cat. III/226) b = from Brown & Verschueren (1997A&A...319..811B) Note (4): Duplicity flag as follows: SB8 = Eighth Orbital Elements of Spectroscopic Binaries (Batten et al., 1989, Cat. V/64) L87 = Levato et al. (1987ApJS...64..487L) VDH = Visual Double Stars in Hipparcos (Dommanget & Nys, 2000, Cat. I/260) ST = Shatsky & Tokovinin (2002, Cat. J/A+A/382/92)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 02-Mar-2006
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