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| Paper: |
Asteroseismology of Rich Pulsating White Dwarfs |
| Volume: |
462, Progress in Solar/Stellar Physics with Helio- and Asteroseismology |
| Page: |
164 |
| Authors: |
Bischoff-Kim, A.; Metcalfe, T. S. |
| Abstract: |
White dwarfs are the end product of the evolution of around 98% of the stars. Buried in their interiors are the records of physical processes that take place during earlier stages in the life of the star. White dwarf asteroseismology provides a powerful test of these predictions. White dwarfs pulsate through nonradial g-mode oscillations with periods observed between ∼ 200 and 1300 seconds. Asteroseismology of these stars reveals the location of any internal chemical transition zones and potentially the “shape” of these transition zones.
The best targets to test the predictions of stellar evolution with white dwarf asteroseismology are DAVs and DBVs that exhibit a dozen or more pulsation modes. These rich white dwarf pulsators provide both a challenge to asteroseismic analyses and an opportunity to probe the chemical structure of white dwarf interiors in greater detail. We present some results of such analyses for DBV EC 20058–5234 (hereafter EC 20058) and DAV EC 14012–1446 (hereafter EC 14012). The latter is a particularly rich white dwarf pulsator with 20 modes, 10 of which are potentially ℓ = 1 consecutive modes. |
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