Discovery of ZZ Cetis in detached white dwarf plus main-sequence binaries
- Pyrzas, S.
- Gaensicke, B. T.
- Hermes, J. J.
- Copperwheat, C. M.
- Rebassa-Mansergas, A.
- Dhillon, V. S.
- Littlefair, S. P.
- Marsh, T. R.
- Parsons, S. G.
- Savoury, C. D. J.
- Schreiber, M. R.
- Barros, S. C. C.
- Bento, J.
- Breedt, E.
- Kerry, P.
DOIAbstract
International audienceWe present the first results of a dedicated search for pulsating white dwarfs (WDs) in detached WD plus main-sequence (MS) binaries. Candidate systems were selected from a catalogue of WD+ MS binaries, based on the surface gravities and effective temperatures of the WDs. We observed a total of 26 systems using ULTRACAM mounted on ESO's 3.5 m New Technology Telescope at La Silla. Our photometric observations reveal pulsations in seven WDs of our sample, including the first pulsating WD with an MS companion in a post-common envelope (CE) binary, SDSS J1136+0409. Asteroseismology of these new pulsating systems will provide crucial insight into how binary interactions, particularly the CE phase, affect the internal structu...
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