Is WD0433+270 an iron-core white dwarf?

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Título:	Is WD0433+270 an iron-core white dwarf?
Autor/a:	Catalan, S.; Ribas, I.; Isern, J.; Garcia Berro, E.
Abstract:	We study a common proper motion pair formed by a white dwarf (WD0433+270) and a mainsequence star (BD+26 730) that apparently has been classified as a member of the Hyades open cluster. Previous studies of the white dwarf component yielded a cooling time of ~ 4 Gyr. Although it has not been discussed before explicitly, this result is 6 times larger than the age of the Hyades cluster, giving rise to an apparent conflict between the cooling ages of white dwarfs and those of main sequence stars. We investigate whether this system really belongs to the Hyades cluster and, accordingly, provide a possible explanation of the nature of the white dwarf member considering different core compositions. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
Abstract:	Peer Reviewed
Materia(s):	-Àrees temàtiques de la UPC::Aeronàutica i espai -White dwarf stars -Iron -Supernovae -Cooling age -Cooling time -Core composition -Iron cores -Main sequence stars -Open clusters -Proper motion -White dwarfs -Estels nans
Derechos:	Attribution-NonCommercial-ShareAlike 3.0 Spain http://creativecommons.org/licenses/by-nc-sa/3.0/es/
Tipo de documento:	Artículo - Versión publicada Objeto de conferencia
Editor:	PoS - Proceedings of Science
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Vilardell Sallés, Francesc; Ribas, I.; Jordi i Nebot, Carme

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