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Paper: Unraveling the Internal Chemical Composition of Kepler White Dwarf Pulsators
Volume: 509, 20th European Workshop on White Dwarfs (EuroWD16)
Page: 283
Authors: Giammichele, N.; Charpinet, S.; Fontaine, G.; Brassard, P.
Abstract: We present the results of the asteroseismic analysis of a selected sample of white dwarf stars in the Kepler and Kepler-2 fields. Our seismic procedure using the forward method based on physically sound, static models, includes a new core parameterization leading us to reproduce the periods of these stars at the precision of the observations. These new fits outperform current state-of-the-art standards by orders of magnitude. We precisely establish the internal structures of these stars and unravel the inner C/O stratification of their core. By studying their internal chemical compositions, and more precisely the C/O profiles, this opens up interesting perspectives on better constraining key processes in stellar physics such as nuclear burning, convection, and mixing, that shape this stratification over time.
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