Astronomy and Astrophysics – Astronomy
Scientific paper
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.
Gies Douglas R.
Hartkopf William I.
Mason Brian D.
Penny Laura R.
Turner Nils H.
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