| Issue | A&A Volume426, Number2, November I 2004 | |
|---|---|---|
| Page(s) | L45 - L48 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361:200400079 | |
| Published online | 11 October 2004 | |
Letter to the Editor
Detection of non-radial g-mode pulsations in the newly discovered PG 1159 star HE 1429-1209
T. Nagel andK. Werner
Institut für Astronomie und Astrophysik, Abteilung Astronomie, Universität Tübingen, Sand 1, 72076 Tübingen, Germany e-mail: nagel@astro.uni-tuebingen.de
Received: 23 August 2004
Accepted: 10 September 2004
We performed time-series photometry of the PG 1159-type starHE 1429-1209, which was recently discovered in the ESO SPY survey. We show that the star is a low-amplitude (≈0.05 mag) non-radial g-mode pulsator with a period of 919 s.HE 1429-1209 is among the hottest known post-AGB stars (
K) and, together with the known pulsatorRX J2117.1+3412, it defines empirically the blue edge of the GW Vir instability strip in the HRD at high luminosities.
Key words:stars: white dwarfs / stars: individual: HE 1429-1209 / stars: variables: GW Vir / stars: AGB and post-AGB
© ESO, 2004
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