GD 99 - an unusual, rarely observed DAV white dwarf

(2) Institute of Astronomy; Austria); B. Steininger (2); Budapest; G. Vir\'aghalmy (1) ((1) Konkoly Observatory; Hungary; M. Papar\'o (1); University of Vienna; Vienna; Zs. Bogn\'ar (1)

arxiv: 0708.0190 · v1 · submitted 2007-08-01 · 🌌 astro-ph

GD 99 - an unusual, rarely observed DAV white dwarf

Zs. Bogn\'ar (1) , M. Papar\'o (1) , B. Steininger (2) , G. Vir\'aghalmy (1) ((1) Konkoly Observatory , Budapest , Hungary , (2) Institute of Astronomy , University of Vienna

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Vienna Austria)

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keywords longperiodsshortunusualanalysedavailablebeenbehaviour

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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.

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GD 99 - an unusual, rarely observed DAV white dwarf

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