The white dwarf population of NGC 6397

Author： Torres Santiago   García-Berro Enrique   Althaus Leandro G.   Camisassa María E.  

Publisher： Edp Sciences

E-ISSN： 1432-0746|581|issue|A90-A90

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.581, Iss.issue, 2015-09, pp. : A90-A90

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Context. NGC 6397 is one of the most interesting, well-observed, and most thoroughly theoretically studied globular clusters. The existing wealth of observations allows us to study the reliability of the theoretical white dwarf cooling sequences of low-metallicity progenitors, to determine the age of NGC 6397 and the percentage of unresolved binaries. We also assess other important characteristics of the cluster, such as the slope of the initial mass function or the fraction of white dwarfs with hydrogen-deficient atmospheres.

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