Binarity among B-stars in NGC 6231.

Details Binarity among B-stars in NGC 6231. Binarity among B-stars in NGC 6231.

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...315..384r&link_type=abstract

Astronomy and Astrophysics, v.315, p.384-395

Astronomy and Astrophysics

Astrophysics

23

Cluster: Open: Individual: Ngc 6231, Technique: Radial Velocities, Binaries: General, Spectroscopic

Scientific paper

We have measured radial velocities for 53 B-type stars, between B1 and B9, in the young open cluster NGC6231 through a cross-correlation technique with synthetic spectra. Two measurements for 36 stars of the sample were obtained with a time separation of about two years. We derived a minimum binary fraction of 52% in the considered population. The velocity determination precisions were simulated and we analysed their dependence upon the S/N ratios of the spectra and upon the stellar rotational velocities. We discuss the selection of the templates for the correlation.

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