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Paper: Asteroseismology of the ZZ Ceti and DAZ GD 133
Volume: 509, 20th European Workshop on White Dwarfs (EuroWD16)
Page: 355
Authors: Fu, J.-N.; Vauclair, G.; Su, J.; Cang, T.; Li, C.; Xue, H.; Jiang, X.-J.; Li, Y.; Niu, H.; Zhang, X.; Colas, F.; Dolez, N.; Fox Machado, L.; Michel, R.; Alvarez, M.; Kim, S.-L.
Abstract: 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. GD 133 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 around the barycenter of the system. We started a multi-site photometric follow-up aimed at detecting the signature of this potential planet. As a preliminary result of this work in progress, we give the parameters of the GD 133 best-fit model derived from asteroseismology.
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