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Paper: Extreme Amplitude Variations of the Pulsating DB White Dwarf Star PG 1456+103 Traced with the Whole Earth Telescope
Volume: 469, 18th European White Dwarf Workshop (EUROWD12)
Page: 53
Authors: Handler, G.; WET network of collaborators
Abstract: PG 1456+103 was chosen as a WET target because it exhibited a complicated pulsation pattern not resolvable with a two-site photometric campaign. Pre-WET observations however showed that the pulsations had almost completely disappeared. They grew back in amplitude during the WET run to reach their “normal” values one month after the global network observations. We document the amplitude changes and discuss them along with possible asteroseismic inferences. We suggest that the total power in the oscillations of pulsating white dwarfs is not conserved when amplitude and frequency changes occur.
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