https://doi.org/10.1051/epjconf/20134305013
GD 154: White dwarf with multi- and monoperiodic pulsation
Konkoly Observatory, MTA CSFK, Konkoly-Thege M. u. 15-17, 1121 Budapest, Hungary
a e-mail: benko@konkoly.hu
We present the white dwarf GD 154 as an example where either monoperiodic or multiperiodic pulsation were found at different epochs. The mono-multi-monoperiodic stage seems to alternate. Many questions have been raised. Is this behaviour connected to the evolution of DAV stars? How often does it happen? Is there any regularity in this change of the pulsational behaviour or is it irregular?
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
