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Stellar Exotica in 47 Tucanae

Published online by Cambridge University Press:  01 September 2007

C. Knigge ,
A. Dieball ,
J. Maíz-Apellániz ,
K. S. Long ,
D. R. Zurek  and
Mike M. Shara
C. Knigge
Affiliation:
School of Physics & Astronomy, University of Southampton, UK email: christian@astro.soton.ac.uk
A. Dieball
Affiliation:
School of Physics & Astronomy, University of Southampton, UK email: christian@astro.soton.ac.uk
J. Maíz-Apellániz
Affiliation:
Institute de Astrofísica de Andalucía, Granada, Spain
K. S. Long
Affiliation:
Space Telescope Science Institute, Baltimore, USA
D. R. Zurek
Affiliation:
American Museum of Natural History, New York, USA
Mike M. Shara
Affiliation:
American Museum of Natural History, New York, USA
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Abstract

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We have used far-ultraviolet spectroscopy and broad-band photometry to identify and study dynamically-formed stellar exotica in the core of 47 Tucanane. Here, we present a subset of our main results, including: (i) the spectroscopic confirmation of three cataclysmic variables; (ii) the discovery of stripped sub-giant core in a binary system with a dark primary; (iii) the discovery of a Helium white dwarf; (iv) the discovery of a blue straggler with a white dwarf companion.

Keywords

globular clusters: individual (47 Tuc)ultraviolet: starsstars: novaecataclysmic variablesstars: white dwarfsstars: blue stragglersstellar dynamics

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