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 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 77 67 Radial velocities of observed Sco-Cen OB stars
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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
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Bytes Format Units Label Explanations
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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)
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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 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 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)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 02-Mar-2006