Blue stragglers and the binary hypothesis

Details Blue stragglers and the binary hypothesis Blue stragglers and the binary hypothesis

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...210...66m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 210, no. 1-2, Feb. 1989, p. 66-77.

Astronomy and Astrophysics

Astrophysics

21

Binary Stars, Blue Stars, Star Clusters, Stellar Evolution, Stellar Rotation, Astronomical Models, Color-Magnitude Diagram, Cross Correlation, Open Clusters, Radial Velocity

Scientific paper

An observational test of the binary hypothesis for the origin of blue straggler stars is conducted by searching for radial velocity variables among 30 blue stragglers in several galactic clusters. Only one of the slowly rotating blue stragglers is detected as a radial velocity variable, and it is shown that this finding does not correspond to the close binary model at the 99 percent confidence level. It is concluded that binarity is almost certainly not a causal requirement for any blue straggler. The results are compared to the binary distribution expected under the model of Collier and Jenkins (1984).

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