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Paper: White Dwarfs in the Kepler Field - What's New?
Volume: 493, 19th European Workshop on White Dwarfs
Page: 169
Authors: Greiss, S.; Gänsicke, B. T.; Hermes, J. J.; Giammichele, N.; Fontaine, G.; Koester, D.; Bell, K.; Breedt, E.; Steeghs, D.
Abstract: As white dwarfs cool, they go through instability strips by exhibiting periodic variations about the mean intensity of their light. Asteroseismology can probe the interiors of white dwarfs and provide an insight on their compositions, rotation period, mass, temperature and luminosity, by studying their pulsations. We present our deep optical photometric survey: the Kepler-INT Survey. We find 43 new white dwarfs in the Kepler field, chosen on the basis of their colours. We also discovered nine new pulsating white dwarfs and present Kepler data for four of them. Rotational splitting is detected in all four stars, indicating spin periods of a few days, which confirms that the majority of white dwarfs are slow rotators.
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