| Issue |
EPJ Web Conf.
Volume 152, 2017
Wide-Field Variability Surveys: A 21st Century Perspective – 22nd Los Alamos Stellar Pulsation – Conference Series Meeting
|
|
|---|---|---|
| Article Number | 05006 | |
| Number of page(s) | 2 | |
| Section | Asteroseismology in the era of large surveys | |
| DOI | https://doi.org/10.1051/epjconf/201715205006 | |
| Published online | 08 September 2017 | |
https://doi.org/10.1051/epjconf/201715205006
Asteroseismology of the ZZ Ceti and DAZ GD133
1 Department of Astronomy, Beijing Normal University, 100875 Beijing, China
2 Université de Toulouse, UPS-OMP, IRAP, Toulouse, France
3 CNRS, IRAP, 14 avenue Edouard Belin, F-31400 Toulouse, France
Published online: 8 September 2017
GD 133 is a DAZ white dwarf with an atmosphere polluted by heavy elements accreted from a debris disk, which is formed by the disruption of rocky planetesimals with orbits bringing them at the white dwarf tidal radius. To reach such orbits implies the potential presence of a perturbing planet. GD133 is a ZZ Ceti pulsator close to the blue edge of the instability strip. The presence of a planet could be revealed by the periodical variation of the observed pulsation periods induced by the orbital motion of the white dwarf. We started a multi-site photometric follow-up aimed at detecting the signature of this potential planet. As a partial result of this work in progress, we give the parameters of a preliminary best-fit model derived from asteroseismology.
© The Authors, published by EDP Sciences, 2017
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