J/A+A/507/541 Radial velocities in cluster Blanco 1 (Gonzalez+, 2009)
Spectroscopic study of the open cluster Blanco 1.
Gonzalez J.F., Levato H.
<Astron. Astrophys. 507, 541 (2009)>
=2009A&A...507..541G 2009A&A...507..541G
ADC_Keywords: Clusters, open ; Radial velocities
Keywords: open clusters and associations: individual: Blanco 1 -
binaries, spectroscopic - techniques: radial velocities
Abstract:
As a part of our program on binaries in open clusters, we present a
spectroscopic study of the bright stars of Blanco 1 aimed at detecting
and characterizing spectroscopic binaries. Forty five stars previously
mentioned as cluster candidates, plus another 24 stars in a wider
region around the cluster were observed repeatedly during 6 years,
with a spectral resolving power 13300. Radial velocities were measured
by cross-correlations. We obtained a mean cluster velocity of
6.2±0.3km/s and determined kinematic membership. Eleven
spectroscopic binaries were detected, and orbital solutions are
presented for eight of them. Six binaries are confirmed to be members
of the cluster. All of them are single-lined spectroscopic systems
with periods in the range 1.9-1380 days. Considering all suspected
binaries, the cluster binary frequency amounts to about 50%.
Description:
Radial velocities for 68 stars brighter than V=11.3 in the region of
the open cluster Blanco 1 are presented. The sample includes all
cluster main-sequence stars brighter than V=10.5 whithin a radius of
1.5deg from the cluster center. Radial velocities have been measured
by cross-correlations of echelle spectra of resolving power R=13300.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 84 70 List of studied stars
table1.dat 46 545 Radial Velocities
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See also:
J/A+AS/121/213 : BV photometry of Blanco 1 stars (Panagi+, 1997)
J/A+A/399/919 : X-ray Luminosities in Blanco 1 (Pillitteri+, 2003)
J/A+A/421/175 : XMM sources in Blanco 1 (Pillitteri+, 2004)
J/MNRAS/364/272 : Elemental abundances in Blanco 1 (Ford+, 2005)
J/A+A/471/499 : Low-mass stars and brown dwarfs in Blanco 1 (Moraux+, 2007)
J/A+A/485/95 : Velocities of F-G-K stars in Blanco 1 (Mermilliod+, 2008)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Star identification (G1)
16- 17 I2 h RAh Simbad or WEBDA Right Ascension (J2000.0)
19- 20 I2 min RAm Simbad or WEBDA Right Ascension (J2000.0)
22- 25 F4.1 s RAs Simbad or WEBDA Right Ascension (J2000.0)
27 A1 --- DE- Simbad or WEBDA Declination sign (J2000.0)
28- 29 I2 deg DEd Simbad or WEBDA Declination (J2000.0)
31- 32 I2 arcmin DEm Simbad or WEBDA Declination (J2000.0)
34- 35 I2 arcsec DEs ? Simbad or WEBDA Declination (J2000.0)
38- 43 F6.3 mag Bmag ? Simbad or WEBDA B band magnitude
45- 50 F6.3 mag Vmag ? Simbad or WEBDA V band magnitude
52- 60 A9 --- SpType Simbad or WEBDA MK spectral type
62- 81 A20 --- SName Simbad Name
83- 84 I2 --- Nm Number of RV measurements in table1.dat
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Star identification (G1)
18- 30 F13.5 d HJD Heliocentric Julian date
33- 39 F7.2 km/s RV Radial velocity
42- 46 F5.2 km/s e_RV Radial velocity error
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Global notes:
Note (G1): For the double-lined spectroscopic binary HD224113 the
measurements of the two components A and B are listed.
For the shell star W75 the stellar and shell radial velocities
(with identification W75sh) are listed.
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Acknowledgements:
F. Gonzalez, fgonzalez(at)icate-conicet.gob.ar
(End) Patricia Vannier [CDS] 30-Oct-2009