Access to Astronomical Catalogues

← Click to display the menu
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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 84 70 List of studied stars table1.dat 46 545 Radial Velocities
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
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
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
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.
Acknowledgements: F. Gonzalez, fgonzalez(at)
(End) Patricia Vannier [CDS] 30-Oct-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

catalogue service