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arxiv: 0804.1792 · v1 · submitted 2008-04-10 · 🌌 astro-ph

The Puzzling White Dwarf Cooling Sequence in NGC6791: A Simple Solution

L. R. Bedin (1) , M. Salaris (2) , G. Piotto (3) , S. Cassisi (4) , A. P. Milone (3) , J. Anderson (1) , I. R. King (5) ((1) STScI , (2) J.M.Univ.Liverpool
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(3) Univ.PD (4) INAF-Obs.Teramo (5) Univ.of Washington Seattle)
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keywords coolingdwarfngc6791puzzlingsequencewhiteaccountedbinary
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In this paper we demonstrate that the puzzling bright peak in the luminosity function of the white dwarf (WD) cooling sequence of NGC6791 can be naturally accounted for if ~34% of the observed WDs are WD+WD binary systems.

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