Volume 558, October 2013
|Number of page(s)||7|
|Section||Stellar structure and evolution|
|Published online||03 October 2013|
Search for p-mode oscillations in RX J2117.1+3412⋆
1 Institute of Astronomy, National Tsing Hua University, 30013 Hsinchu, Taiwan
2 Department of Physics, National Tsing Hua University, 30013 Hsinchu, Taiwan
3 LESIA, Paris Observatory, 92195 Meudon, France
Received: 20 June 2013
Accepted: 13 August 2013
We report the effort to search for white dwarf p-mode oscillations in RX J2117.1+3412 (V2027 Cyg), a GW Vir star. The data were taken with Miosotys, a multi-fiber photometer, mounted on the 1.93-m telescope at Observatoire de Haute-Provence (OHP) with a 20-Hz cadence in May 2010 and June 2012. Two intriguing signatures at 1.2081 Hz and 2.5852 Hz were found at 3.8-σ and 3.5-σ significance levels, respectively. However, possible atmospheric effects cannot be ruled out. If these two features are not real, the 3-σ upper limit of the relative amplitude for the possible oscillations in the frequency range from 1 to 10 Hz is estimated to be about 6 × 10-4. This is the first report in the literature for a p-mode oscillation search of GW Vir stars.
Key words: stars: individual: RX J2117.1+3412 / stars: oscillations / white dwarfs
Reduced light curves are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (22.214.171.124) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/558/A63
© ESO, 2013
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