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New insight on ultimate stage of stellar evolution with the Kepler white dwarf pulsators
Noemi Giammichele (IRAP-CNRS/OMP), Stéphane Charpinet (IRAP-CNRS/OMP), Gilles Fontaine (Université de Montréal), Pierre Brassard (Université de Montréal)
White dwarf stars can be seen as stellar fossiles that keep buried in their interior many features from their past evolution. By studying their internal chemical compositions, and more precisely the carbon-oxygen profiles, we can place constraints on key processes in stellar physics such as nuclear burning, convection, and mixing, that shape this stratification over time. We present the asteroseismic analyses of a selected sample of white dwarf stars in the Kepler and Kepler2 fields. We precisely establish their internal structures using the forward method based on physically sound models. This opens up interesting perspectives on better constraining the physical processes occurring during the prior evolution of the star.