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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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