The frequency of binary stars in the young cluster Trumpler 14

Details The frequency of binary stars in the young cluster Trumpler 14 The frequency of binary stars in the young cluster Trumpler 14

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105..588p&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 688, p. 588-594.

Astronomy and Astrophysics

Astronomy

29

Binary Stars, O Stars, Radial Velocity, Star Clusters, Stellar Spectra, Stellar Spectrophotometry, Pixels, Statistical Analysis

Scientific paper

We present radial-velocity data for the six brightest members of the open cluster Trumpler 14 based on high-dispersion spectra obtained over a five-night interval. None of these O-type stars appear to be spectroscopic binaries with periods of the order of a week or less, and none are speckle binaries. This binary fraction is low for O-type stars, and we suggest that the lack of primordial hard binaries and their dynamical interactions may explain how the cluster has maintained a high spatial density even after several cluster crossing times.

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