| Issue |
EPJ Web of Conferences
Volume 43, 2013
40th Liège International Astrophysical Colloquium. Ageing Low Mass Stars: From Red Giants to White Dwarfs
|
|
|---|---|---|
| Article Number | 05007 | |
| Number of page(s) | 6 | |
| Section | White Dwarfs | |
| DOI | https://doi.org/10.1051/epjconf/20134305007 | |
| Published online | 21 March 2013 | |
https://doi.org/10.1051/epjconf/20134305007
Quantitative asteroseismology: Determination of the core composition and layering of the ZZ Ceti star R548. Part I
Département de Physique, Université de Montréal, CP. 6128, Succursale Centre-Ville, Montréal, QC H3C 3J7, Canada
a e-mail: noemi@astro.umontreal.ca
We present a detailed asteroseismological study of the pulsating white dwarf R548 based on fits to newly detected periods and the use of the forward method. In this first part, we concentrate on the frequency extraction analysis. Based on an unexploited CFHT/LAPOUNE broadband photometric campaign of high S/N, we are able to obtain a finer frequency spectrum and uncover two triplets, two doublets, and two singlets. The low-amplitude and “simple” pulsator R548 is an ideal candidate for carrying on a complete asteroseismological analysis within the framework of the adiabatic approximation to obtain optimized structural parameters, including the envelope layering and the bulk composition of the core.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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