Mapping the ZZ Ceti Instability Strip: Discovery of 6 New Pulsators

Details Mapping the ZZ Ceti Instability Strip: Discovery of 6 New Pulsators Mapping the ZZ Ceti Instability Strip: Discovery of 6 New Pulsators

2006-06-07

arxiv.org/abs/astro-ph/0606135v1

Astron.J.132:831-835,2006

Astronomy and Astrophysics

Astrophysics

5 pages, 5 figures, 4 tables, accepted for publication in the Astronomical Journal

Scientific paper

10.1086/506516

As part of an ongoing program to map better the empirical instability strip of pulsating ZZ Ceti white dwarfs, we present a brief progress report based on our last observing season. We discuss here high-speed photometric measurements for 6 new pulsators. These stars were selected on the basis of preliminary measurements of their effective temperature and surface gravity that placed them inside or near the known ZZ Ceti instability strip. We also report detection limits for a number of DA white dwarfs that showed no sign of variability. Finally, we revisit the ZZ Ceti star G232-38 for which we obtained improved high-speed photometry.

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