Mapping the ZZ Ceti Instability Strip: Discovery of Six New Pulsators | Zendy

A. Gianninas | Zendy; P. Bergeron | Zendy; G. Fontaine | Zendy

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

Author(s) -

A. Gianninas,

P. Bergeron,

G. Fontaine

Publication year - 2006

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/506516

Subject(s) - instability strip , white dwarf , photometry (optics) , physics , stars , instability , astrophysics , sign (mathematics) , astronomy , mathematics , cepheid variable , mathematical analysis , mechanics

As part of an ongoing program to map better the empirical instability stripof pulsating ZZ Ceti white dwarfs, we present a brief progress report based onour last observing season. We discuss here high-speed photometric measurementsfor 6 new pulsators. These stars were selected on the basis of preliminarymeasurements of their effective temperature and surface gravity that placedthem inside or near the known ZZ Ceti instability strip. We also reportdetection limits for a number of DA white dwarfs that showed no sign ofvariability. Finally, we revisit the ZZ Ceti star G232-38 for which we obtainedimproved high-speed photometry.Comment: 5 pages, 5 figures, 4 tables, accepted for publication in the Astronomical Journa

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