August 11-15, 2014


High-speed photometric observations of ZZ Ceti white dwarf candidates

Elizabeth M. Green (Steward Observatory, University of Arizona)

Marie-Michèle Limoges, Pierre Bergeron, Gilles Fontaine, Patrick Dufour (Université de Montréal)

Alexandros Gianninas (University of Oklahoma)

C. Johanna O'Malley, Blythe Guvenen, Lauren I. Biddle, Kyle Pearson, Travis W. Deyoe, Christopher W. Bullivant (Steward Observatory, University of Arizona)

JJ Hermes (University of Warwick)

Valerie Van Grootel, Mathieu Grosjean (Université de Liège)

We present high-speed photometric observations of ZZ Ceti white dwarf candidates drawn from the spectroscopic survey of bright DA stars from the Villanova White Dwarf Catalog by Gianninas et al., and from the recent spectroscopic survey of white dwarfs within 40 parsecs of the Sun by Limoges et al. We report the discovery of two new ZZ Ceti pulsators from these surveys, as well as several constant stars, which are then used to better refine the location of the instability strip.

Mode of presentation: poster