The Formation Rate of Blue Stragglers in 47 Tucanae

Details The Formation Rate of Blue Stragglers in 47 Tucanae The Formation Rate of Blue Stragglers in 47 Tucanae

1999-11-02

arxiv.org/abs/astro-ph/9911023v1

Astronomy and Astrophysics

Astrophysics

17 pages, 9 figures, submitted to the Astrophysical Journal

Scientific paper

10.1086/308846

We investigate the effects of changes in the blue straggler formation rate in globular clusters on the blue straggler distribution in the color-magnitude diagram. We find that the blue straggler distribution is highly sensitive to the past formation rate. Comparing our models to new UBV observations of a region close to the core of 47 Tucanae suggests that this cluster may have stopped forming blue straggler formation several Gyr ago. This cessation of formation can be associated with an epoch of primordial binary burning which has been invoked in other clusters to infer the imminence of core collapse.

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