Toward a systematic cartography of the chemical stratification inside white dwarfs from deep asteroseismic probing of ZZ Ceti stars

• DOI: 10.48550/arxiv.2107.03797
• Publication Date: 2021-01-01
• Authors: S. Charpinet; N. Giammichele; P. Brassard; G. Fontaine; P. Bergeron; Weikai Zong; V. Van Grootel; A. S. Baran
• Keywords: Stratification (seeds)

DA-type white dwarfs account for 80% of all and represent, most them, the ultimate outcome typical evolution low-to-intermediate mass stars. Their internal chemical stratification is strongly marked by passed, often uncertain, stellar processes that occurred during helium (core shell) burning phases, i.e., from horizontal branch through AGB post-AGB stages. Pulsating dwarfs, in particular "cool" ZZ Ceti variables, offer an outstanding opportunity to dig into these stars fully exploiting their asteroseismic potential. With our recent tools dedicated purpose, we show a complete cartography main constituents dwarf can be inferred, leading strong constraints on C/O core structure produced mentioned above. This opens up way toward systematic exploration white-dwarf properties.