Thirty-Five New Pulsating DA White Dwarf Stars

Details Thirty-Five New Pulsating DA White Dwarf Stars Thirty-Five New Pulsating DA White Dwarf Stars

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...607..982m&link_type=abstract

The Astrophysical Journal, Volume 607, Issue 2, pp. 982-998.

Other

66

Stars: Imaging, Stars: Oscillations, Stars: Variables: Other, Techniques: Photometric, Stars: White Dwarfs

Scientific paper

We present 35 new pulsating DA (hydrogen atmosphere) white dwarf stars discovered from the Sloan Digital Sky Survey (SDSS) and the Hamburg Quasar Survey (HQS). We have acquired high-speed time series photometry of preselected DA white dwarfs with a prime focus CCD photometer on the 2.1 m telescope at McDonald Observatory over 15 months. We selected these stars on the basis of prior photometric and spectroscopic observations by the SDSS and HQS. For the homogeneous SDSS sample, we achieve a success rate of 80% for finding new variables at a detection threshold of 0.1%-0.3%. With 35 newly discovered DA variable white dwarfs, we almost double the current sample of 39.

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