Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103.1302e&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 103, April 1992, p. 1302-1307.
Astronomy and Astrophysics
Astronomy
31
Astronomical Catalogs, Binary Stars, Pre-Main Sequence Stars, Star Clusters, Supergiant Stars, Main Sequence Stars, Stellar Evolution
Scientific paper
The age distribution of the early-type supercluster members which dominate FK 5 is studied by means of the proper motions derived by Fricke et al. (1988). The main values of the total space velocity of the members and their dependence on radial distance from the sun demonstrates the characteristic dependence of isoperiodic galactic orbits. Models incorporating convective overshoot yield a wide range of ages, and dual epochs of star formation are identified for some individual clusters. The results of the analysis include three wide pairs of premain-sequence stars, three late-type supergiants, and one evolved close visual binary. Recent speckle observations can be utilized to determine the orbit of the latter binary and to determine the structure of a potential equal-component binary comprising two main-sequence stars. Orbital and stellar parameters are listed for the clusters which make up the Pleiades supercluster including periods, cluster parallaxes, and individual masses.
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