The Formation Rate of Blue Stragglers in 47 Tucanae | Zendy

Alison Sills | Zendy; C. D. Bailyn | Zendy; P. D. Edmonds | Zendy; Ronald L. Gilliland | Zendy

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The Formation Rate of Blue Stragglers in 47 Tucanae

Author(s) -

Alison Sills,

C. D. Bailyn,

P. D. Edmonds,

Ronald L. Gilliland

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/308846

Subject(s) - blue straggler , globular cluster , astrophysics , cluster (spacecraft) , physics , astronomy , stars , computer science , programming language

We investigate the effects of changes in the blue straggler formation rate inglobular clusters on the blue straggler distribution in the color-magnitudediagram. We find that the blue straggler distribution is highly sensitive tothe past formation rate. Comparing our models to new UBV observations of aregion close to the core of 47 Tucanae suggests that this cluster may havestopped forming blue straggler formation several Gyr ago. This cessation offormation can be associated with an epoch of primordial binary burning whichhas been invoked in other clusters to infer the imminence of core collapse.Comment: 17 pages, 9 figures, submitted to the Astrophysical Journa

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