THE FREQUENCY OF BINARY STARS IN THE YOUNG CLUSTER TRUMPLER-14

Authors
PENNY LR GIES DR HARTKOPF WI MASON BD TURNER NH
Citation
Lr. Penny et al., THE FREQUENCY OF BINARY STARS IN THE YOUNG CLUSTER TRUMPLER-14, Publications of the Astronomical Society of the Pacific, 105(688), 1993, pp. 588-594
Citations number
43
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of the Pacific
ISSN journal
00046280 → ACNP
Volume
105
Issue
688
Year of publication
1993
Pages
588 - 594
Database
ISI
SICI code
0004-6280(1993)105:688<588:TFOBSI>2.0.ZU;2-3
Abstract
We present radial-velocity data for the six brightest members of the o pen cluster Trumpler 14 based on high-dispersion spectra obtained over a five-night interval. None of these O-type stars appear to be spectr oscopic 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, a nd we suggest that the lack of primordial hard binaries and their dyna mical interactions may explain how the cluster has maintained a high s patial density even after several cluster crossing times.