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White-dwarf asteroseismology: An update

Published online by Cambridge University Press:  09 October 2020

Alejandro H. Córsico Open the ORCID record for Alejandro H. Córsico [Opens in a new window]
Alejandro H. Córsico*
Affiliation:
Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque s/n, (1900) La Plata, Argentina Instituto de Astrofísica de La Plata, IALP (CCT La Plata), CONICET-UNLP email: [email protected]
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Abstract

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The vast majority of stars that populate the Universe will end their evolution as white-dwarf stars. Applications of white dwarfs include cosmochronology, evolution of planetary systems, and also as laboratories to study non-standard physics and crystallization. In addition to the knowledge of their surface properties from spectroscopy combined with model atmospheres, the global pulsations that they exhibit during several phases of their evolution allow spying on the deep interior of these stars. Indeed, by means of asteroseismology, an approach based on the comparison between the observed pulsation periods of variable white dwarfs and the periods predicted by representative theoretical models, we can infer details of the internal chemical stratification, the total mass, and even the stellar rotation profile and strength of magnetic fields. In this article, we review the current state of the area, emphasizing the latest findings provided by space-mission data.

Keywords

stars: oscillationsstars: evolutionwhite dwarfs
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S357: White Dwarfs as Probes of Fundamental Physics: Tracers of Planetary, Stellar and Galactic Evolution , October 2019 , pp. 93 - 106
Copyright
© International Astronomical Union 2020

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