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New analysis of ZZ Ceti star PG 2303+243

Published online by Cambridge University Press:  18 February 2014

E. Pakštienė ,
V. Laugalys ,
J. Qvam  and
R. P. Boyle
E. Pakštienė
Affiliation:
Institute of Theoretical Physics and Astronomy, Vilnius University, Goštauto 12, Vilnius, Lithuania; email: [email protected]
V. Laugalys
Affiliation:
Institute of Theoretical Physics and Astronomy, Vilnius University, Goštauto 12, Vilnius, Lithuania; email: [email protected]
J. Qvam
Affiliation:
Department of Physics, University of Oslo, P.O. Box 1048 Blindern, N-0316 Oslo, Norway
R. P. Boyle
Affiliation:
Vatican Observatory Research Group, Steward Observatory, Tucson, Arizona 85721, U.S.A.
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Abstract

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The new photometric observations of PG 2303+243 were obtained in 2012 during a campaign carried out with three telescopes. The analysis of these observations is presented in this paper. We identified l = 1 and l = 2 pulsation modes. The pulsation periods were compared with theoretical ones for models of ZZ Ceti stars. This allowed us to estimate the physical parameters of PG 2303+243. The star seems to be cooler and has thicker hydrogen layer than it was thought before. We have derived M*/M⊙ = 0.66, Teff = 11014 K and log(MH/M*)=−4.246 for this star.

Keywords

stars: variableswhite dwarfs: ZZ Ceti: individual: PG 2303+243
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S301: Precision Asteroseismology , August 2013 , pp. 469 - 470
Copyright
Copyright © International Astronomical Union 2014 

References

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