/ftp/cats/aliases/M/./MVP2011



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J/A+A/528/A127      Radial velocities of NGC 280 binaries    (Moni Bidin+, 2011)
The following files can be converted to FITS (extension .fit or fit.gz)
	table3.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A+A/528/A127
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Beginning of ReadMe : J/A+A/528/A127 Radial velocities in the globular NGC 2808 (Moni Bidin+, 2011) ================================================================================ A lack of close binaries among hot horizontal branch stars in globular clusters. II. NGC 2808. Moni Bidin C., Villanova S., Piotto G., Momany Y. <Astron. Astrophys., 528, A127 (2011)> =2011A&A...528A.127M ================================================================================ ADC_Keywords: Clusters, globular ; Binaries, spectroscopic ; Stars, horizontal branch Keywords: stars: horizontal-branch - binaries: close - binaries: spectroscopic - globular clusters: individual: NGC 2808 Abstract: The formation mechanism of hot horizontal branch (HB) stars is still one of the most uncertain points of stellar evolution theories. In the past decade, models based on their binary origin have been very successful in reproducing the properties of field subdwarf-B stars, but the observations of their analogues in globular clusters has posed new problems. In addition, the discovery of multiple populations offered an appealing alternative scenario for the formation of these stars. We search for binaries of period P<=200days among a sample of 83 blue horizontal branch stars (Teff=12000-22000K) in NGC 2808, a cluster known to host three distinct stellar populations and a multimodal horizontal branch. The final sample, after the rejection of stars with incomplete observations or poor quality data, consists of 64 targets. The radial velocity of the targets was measured in fourteen epochs, spanning a temporal interval of  75days. The significant variations were identified by means of a detailed error analysis and a statistical study. Description: Twenty-four single spectra of target stars were collected in fourteen epochs between January 11 and March 24, 2007, with the GIRAFFE spectrograph at the VLT-UT2 telescope, in both visitor and service mode.