A study of the blue stragglers in Praesepe, M 7 and the Hyades Cluster

Details A study of the blue stragglers in Praesepe, M 7 and the Hyades Cluster A study of the blue stragglers in Praesepe, M 7 and the Hyades Cluster

Sep 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974a%26a....34..393c&link_type=abstract

Astronomy and Astrophysics, vol. 34, no. 3, Sept. 1974, p. 393-399.

Astronomy and Astrophysics

Astrophysics

25

A Stars, Hertzsprung-Russell Diagram, Star Clusters, Stellar Evolution, Globular Clusters, Graphs (Charts), Radial Velocity, Spatial Distribution, Stellar Rotation

Scientific paper

Three blue stragglers, i.e., 40 Cancri in Praesepe, HD 162374 in M 7 and 68 Tauri in the Hyades Cluster were studied. For none of them were radial velocity variations found, indicating that a binary nature is unlikely. It is suggested - from colors, temperatures and gravities as well as from evolutionary considerations - that 40 Cancri and possibly HD 162374 are population I blue horizontal branch stars and that 68 Tau is a star with hydrogen shell burning just beginning.

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