A large oxygen-dominated core from the seismic cartography of a pulsating white dwarf

N. Giammichele (), S. Charpinet, G. Fontaine, P. Brassard, E. M. Green, V. Van Grootel, P. Bergeron, W. Zong and M.-A. Dupret
Additional contact information
N. Giammichele: Institut de Recherche en Astrophysique et Planétologie (IRAP), Université de Toulouse, Centre National de la Recherche Scientifique (CNRS), UPS, Centre National d’Études Spatiales (CNES)
S. Charpinet: Institut de Recherche en Astrophysique et Planétologie (IRAP), Université de Toulouse, Centre National de la Recherche Scientifique (CNRS), UPS, Centre National d’Études Spatiales (CNES)
G. Fontaine: Université de Montréal
P. Brassard: Université de Montréal
E. M. Green: Steward Observatory, University of Arizona
V. Van Grootel: Space sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège
P. Bergeron: Université de Montréal
W. Zong: Institut de Recherche en Astrophysique et Planétologie (IRAP), Université de Toulouse, Centre National de la Recherche Scientifique (CNRS), UPS, Centre National d’Études Spatiales (CNES)
M.-A. Dupret: Space sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège

Nature, 2018, vol. 554, issue 7690, 73-76

Abstract: Asteroseismic ‘sounding’ reveals the internal chemical stratification of the white dwarf KIC08626021, which has a central homogeneous core—composed of 86 per cent oxygen—that has a mass of 0.45 solar masses.

Date: 2018
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DOI: 10.1038/nature25136

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