Detection of non-radial g-mode pulsations in the newly discovered PG1159 star HE 1429-1209

Details Detection of non-radial g-mode pulsations in the newly discovered PG1159 star HE 1429-1209 Detection of non-radial g-mode pulsations in the newly discovered PG1159 star HE 1429-1209

2004-09-10

arxiv.org/abs/astro-ph/0409243v1

Astron.Astrophys. 426 (2004) L45-L48

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, to be published in A&A

Scientific paper

10.1051/0004-6361:200400079

We performed time-series photometry of the PG1159-type star HE 1429-1209, which was recently discovered in the ESO SPY survey. We show that the star is a low-amplitude (about 0.05 mag) non-radial g-mode pulsator with a period of 919s. HE 1429-1209 is among the hottest known post-AGB stars (Teff=160000 K) and, together with the known pulsator RX J2117.1+3412, it defines empirically the blue edge of the GW Vir instability strip in the HRD at high luminosities.

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