The age of the W Ursae Majoris stars

Details The age of the W Ursae Majoris stars The age of the W Ursae Majoris stars

Nov 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....44..437v&link_type=abstract

Astronomy and Astrophysics, vol. 44, no. 2, Nov. 1975, p. 437-443.

Astronomy and Astrophysics

Astrophysics

17

Binary Stars, Galactic Clusters, Galactic Rotation, Star Clusters, Stellar Evolution, Age Factor, Celestial Mechanics, Galactic Structure, Stellar Luminosity, Stellar Rotation

Scientific paper

Consequences are discussed for the hypothesis that more than 50% of contact binaries are formed by a fission process of the Jeans-Roxburgh type. Some arguments are presented which support the hypothesis of the fission process from W UMa stars which are members of galactic clusters. The problem of alignment of the axes of rotation in young galactic clusters is examined, and the detectability of W UMa stars is discussed. It is concluded that stars of young clusters generally have a preferential orientation of their rotation axes, which need not coincide with the general orientation of the galactic disk.

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