Blue stragglers in the core of the globular cluster 47 Tucanae

Details Blue stragglers in the core of the globular cluster 47 Tucanae Blue stragglers in the core of the globular cluster 47 Tucanae

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.352..297p&link_type=abstract

Nature (ISSN 0028-0836), vol. 352, July 25, 1991, p. 297-301. Research supported by NASA and ESA.

Physics

135

Binary Stars, Blue Stars, Globular Clusters, Main Sequence Stars, Stellar Physics, Astronomical Photometry, Color-Magnitude Diagram, Hubble Space Telescope, Massive Stars, Stellar Evolution

Scientific paper

High-resolution observations of the core of the globular cluster 47 Tucanae with the Faint Object Camera on the Hubble Space Telescope reveal a high density of 'blue straggler' stars, occupying the upper end of the main sequence from which all stars in the cluster should have long since evolved. Their presence in the dense core supports the hypothesis that they formed by stellar collision and coalescence, and, as the heaviest objects in the cluster, have drifted to the core.

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