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Title:
New ZZ Ceti variables from the KISO survey.
Authors:
Vauclair, G.; Dolez, N.; Fu, J. N.; Chevreton, M.
Publication:
Astronomy and Astrophysics, v.322, p.155-158 (A&A Homepage)
Publication Date:
06/1997
Origin:
CDS
Astronomy Keywords:
WHITE DWARFS, STARS: OSCILLATIONS, VARIABLES, SURVEYS
Bibliographic Code:
1997A&A...322..155V

Abstract

We report the discovery of two new pulsating DA white dwarfs from the Kiso survey of ultraviolet-excess objects. The candidates were selected from their (B-V) and (U-B) color indices. The observations have been performed at the Haute Provence Observatory 1.9m telescope. The new pulsating DA white dwarfs are KUV08368+4026 and KUV11370+4222. KUV08368+4026 shows large amplitude variations and at least two frequencies at 1.62+/-0.11mHz (Period=618.0+/-44s) and at 2.02+/-0.11mHz (Period=494.5+/-28s). KUV11370+4222 shows a much smaller amplitude and a higher frequency at 3.89+/-0.10mHz (Period=257.2+/-6.5s). More observations are needed to confirm additional periods certainly present in these non radial pulsators. The discovery of these two new ZZ Ceti variables increases the number of known pulsating white dwarfs of this type to 26.

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