Paper:	Search For Cool White Dwarf Pulsators
Volume:	203, The Impact of Large-Scale Surveys on Pulsating Star Research, IAU Colloquium 176
Page:	525
Authors:	Nitta, A.; Mukadam, A.; Winget, D. E.; Kanaan, A.; Kleinman, S. J.; Kepler, S. O.; Montgomery, M. H.
Abstract:	We are searching for pulsations in cool (<6000 K) white dwarfs (WDs), hoping to apply asteroseismological techniques to improve our understanding of their structure and the physical processes inside them. This information is important as we use cool WDs to estimate the lower limit of the age of the Galactic disk. Within a spectroscopic and photometric survey of 110 cool WDs by Bergeron, Ruiz, & Legget, we find 28 candidates with appropriate effective temperatures, masses, and chemical compositions for possible pulsations in nonradial g modes with periods similar to those we observe in DAVs. So far, we have observed 4 candidates, but have found no evidence of large variation.

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