New observations of GD 99 are analysed. The unusual pulsation behaviour, showing both long and short periods, has been confirmed. All the available periods show a grouping of short and long period modes with roughly regular spacing. If we interpret the groups separately, a binary nature can be a possible explanation as in the similar cases of WD 2350-0054 and G29-38.
@article{arxiv.0708.0190,
title = {GD 99 - an unusual, rarely observed DAV white dwarf},
author = {Zs. Bognár and M. Paparó and B. Steininger and G. Virághalmy},
journal= {arXiv preprint arXiv:0708.0190},
year = {2009}
}
Comments
2 pages, 1 eps figure; has been accepted for publication in Communications in Asteroseismology (Vol. 150, 2007), Proceedings of the Vienna Workshop on the Future of Asteroseismology